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"Star Trek"
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Episode list for
"Star Trek" (1966) More at IMDbPro »

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Episodes: All (80)  |  With full-length videos ()  |  With videos ()  | See all videos (269) »

Season: 1  |  2  |  3
Year: 1966  |  1967  |  1968  |  1969


Season 1


Season 1, Episode 0: The Cage

Original Air Date—September 1966
Capt. Pike is held prisoner and tested by aliens who have the power to project incredibly lifelike illusions.

"Star Trek" (1966): Season 1: Episode 1 -- A shape-shifting, salt-craving creature terrorizes the crew of Enterprise.
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Season 1, Episode 1: The Man Trap

Original Air Date—8 September 1966
Dr. McCoy discovers his old flame is not what she seems after crew members begin dying from a sudden lack of salt in their bodies.

"Star Trek" (1966): Season 1: Episode 2 -- A powerful teenage boy wreaks havoc aboard the U.S.S. Enterprise

Season 1, Episode 2: Charlie X

Original Air Date—15 September 1966
Captain Kirk must learn the limits to the power of a 17-year-old boy with the psychic ability to create anything and destroy anyone.

"Star Trek" (1966): Season 1: Episode 3 -- Kirk's friend, Gary Mitchell, is transformed into a god-like entity.
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Season 1, Episode 3: Where No Man Has Gone Before

Original Air Date—22 September 1966
The flight recorder of the 200-year-old U.S.S. Valiant relays a tale of terror--a magnetic storm at the edge of the galaxy!

"Star Trek" (1966): Season 1: Episode 4 -- The Enterprise crew catch a virus that removes their inhibitions
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Season 1, Episode 4: The Naked Time

Original Air Date—29 September 1966
The crew is infected with a mysterious disease that removes people's emotional inhibitions to a dangerous degree.

"Star Trek" (1966): Season 1: Episode 5 -- A transporter malfunction creates an evil Kirk

Season 1, Episode 5: The Enemy Within

Original Air Date—6 October 1966
A transporter malfunction splits Captain Kirk into two halves: one meek and indecisive, the other violent and ill tempered. The remaining crew members stranded on the planet cannot be beamed up to the ship until a the problem is fixed.

"Star Trek" (1966): Season 1: Episode 6 -- The Enterprise rescues con artist Harry Mudd and his "beautiful" female cargo.

Season 1, Episode 6: Mudd's Women

Original Air Date—13 October 1966
The Enterprise picks up untrustworthy entrepreneur Harry Mudd accompanied by three beautiful women who immediately put a spell on all the male crew members.

"Star Trek" (1966): Season 1: Episode 7 -- Nurse Chapel's long-lost fiancé is found — along with his androids

Season 1, Episode 7: What Are Little Girls Made Of?

Original Air Date—20 October 1966
Nurse Chapel is reunited with her fiancé; but his new obsession leads him to make an android duplicate of Captain Kirk.

"Star Trek" (1966): Season 1: Episode 8 -- A strange group of children are discovered on an Earth-like planet

Season 1, Episode 8: Miri

Original Air Date—27 October 1966
The Enterprise discovers a planet exactly like Earth; but the only inhabitants are children who contract a fatal disease upon entering puberty.

"Star Trek" (1966): Season 1: Episode 9 -- A new treatment for the criminally insane has deadly results

Season 1, Episode 9: Dagger of the Mind

Original Air Date—3 November 1966
Kirk and psychiatrist Helen Noel are trapped on a maximum security penal colony that experiments with mind control and Spock must use the Vulcan mind-meld to find a way to save them.

"Star Trek" (1966): Season 1: Episode 10 -- Kirk bluffs his way past what appears to be a powerful alien.

Season 1, Episode 10: The Corbomite Maneuver

Original Air Date—10 November 1966
In a section of unexplored space, the Enterprise comes across a marker of sorts that will not let it pass. They destroy the marker and move on but soon find themselves in conflict with an unknown alien who accuses them of trespassing and tells them they have only 10 minutes to live. Kirk decides it's time to play a little poker and literally bluff his way out of the situation by telling the alien that the Enterprise has a device on board that will destroy the alien as well as the Enterprise. The bluff works but the alien turns out to be something quite unexpected.

"Star Trek" (1966): Season 1: Episode 11 -- Spock hijacks the Enterprise to return an injured Captain Pike to Talos IV.

Season 1, Episode 11: The Menagerie: Part I

Original Air Date—17 November 1966
While visiting a Starbase 11, the Enterprise is hijacked by Mr. Spock leaving Captain Kirk but abducting the recently crippled Captain Christopher Pike, former commander of the Enterprise. The destination: Talos IV, off limits by Federation order since the Enterprise first visited the planet thirteen years earlier while then under the command of Captain Pike. After Kirk and Commodore Mendez, the Starbase commander, intercept the Enterprise, a court martial against Spock's apparent treachery is convened. Spock's only defense is the ship's log showing Pike's capture and imprisonment by the inhabitants of Talos IV.

"Star Trek" (1966): Season 1: Episode 12 -- Spock hijacks the Enterprise to return an injured Captain Pike to Talos IV

Season 1, Episode 12: The Menagerie: Part II

Original Air Date—24 November 1966
Spock's court martial views the video stream from Talos IV of Captain Pike's imprisonment 13 years earlier and the Enterprise's attempts to rescue him. Using their powers mind-reading and illusion, the Talosians place Pike in worlds from both his memory and his imagination. The one constant is Vina, the beautiful blonde survivor of a crashed Earth ship, the other half of the Talosians' intended captive Adam and Eve. Number One's attempts to liberate Pike result in herself and another woman captured as additional breeding stock. But when the humans and the Talosians learn more of each other, the situation takes a turn neither side expects. As they watch the past unfold, and as the Enterprise approaches Talos IV once again, Kirk and the court learn the real reason for Spock's mutiny.

"Star Trek" (1966): Season 1: Episode 13 -- Kirk suspects Shakespearean actor Anton Karidian as a mass murderer

Season 1, Episode 13: The Conscience of the King

Original Air Date—8 December 1966
While Captain Kirk investigates whether an actor is actually a presumed dead mass murderer, a mysterious assailant is killing the people who could identify the fugitive.

"Star Trek" (1966): Season 1: Episode 14 -- After attacking an outpost, Romulans battle the Enterprise

Season 1, Episode 14: Balance of Terror

Original Air Date—15 December 1966
The Enterprise must decide on their response when a Romulan ship makes a destructively hostile armed probe of Federation territory.

"Star Trek" (1966): Season 1: Episode 15 -- On shore leave, the crew's thoughts come to life

Season 1, Episode 15: Shore Leave

Original Air Date—29 December 1966
The past three months has left the crew of the Enterprise exhausted and in desperate need of a break, but does this explain McCoy's encounter with a human-sized white rabbit or Kirk crossing paths with the prankster who plagued his days at Starfleet Academy?

"Star Trek" (1966): Season 1: Episode 16 -- Seven Enterprise crew members go on a shuttle mission with Spock in command

Season 1, Episode 16: The Galileo Seven

Original Air Date—5 January 1967
The Galileo, under Spock's command, crash-lands on a hostile planet. As the Enterprise races against time to find the shuttlecraft, Spock's strictly logical leadership clashes with the fear and resentment of his crew.

"Star Trek" (1966): Season 1: Episode 17 -- A powerful entity known as Trelane torments the crew of the Enterprise

Season 1, Episode 17: The Squire of Gothos

Original Air Date—12 January 1967
A being that controls matter and creates planets wants to play with the Enterprise crew.

"Star Trek" (1966): Season 1: Episode 18 -- Kirk is pitted in a barehanded duel with a Gorn

Season 1, Episode 18: Arena

Original Air Date—19 January 1967
When an alien race known as the Gorn destroys an Earth colony, the Enterprise pursues the fleeing Gorn vessel until another race of powerful aliens intervene and force Captain Kirk and the Gorn captain to face off in one on one combat in which the winner will be released and the loser, his ship and his crew destroyed.

"Star Trek" (1966): Season 1: Episode 19 -- The Enterprise is thrown back to 20th century Earth

Season 1, Episode 19: Tomorrow Is Yesterday

Original Air Date—26 January 1967
The Enterprise is thrown back in time to 1960s Earth.

"Star Trek" (1966): Season 1: Episode 20 -- Kirk is recalled for a potential court-martial

Season 1, Episode 20: Court Martial

Original Air Date—2 February 1967
Kirk draws a court martial in the negligent death of a crewman.

"Star Trek" (1966): Season 1: Episode 21 -- The Enterprise crew finds a world run by a computer named Landru

Season 1, Episode 21: The Return of the Archons

Original Air Date—9 February 1967
The Enterprise travels to Beta 2 to learn the fate of the U.S.S. Archon, gone missing a century earlier. One member of the landing party disappears, and one returns in a strangely blissful state. Kirk beams down with another landing party; amidst the chaos of "Festival" their hosts asks if they are "Archons." To learn more, Kirk must convince Betan citizens to disobey Landru, the man who has ruled them for 6,000 years - or find those who already resist. But with the Lawgivers everywhere, that task is going to be difficult...

"Star Trek" (1966): Season 1: Episode 22 -- Kirk meets Khan, a leader of Earth's Eugenics War

Season 1, Episode 22: Space Seed

Original Air Date—16 February 1967
The Enterprise finds a 20th century spaceship which contains dozens of people in suspended animation. While investigating, one of the people is revived automatically. His name is Khan, a strikingly handsome Sihk who charms the Enterprise's historian, Lt. McGivers. While recovering, Khan reads up on the nearly 300 years of history he's missed, plus a lot of technical information on the Enterprise. Through research, Kirk discovers that he's a genetic superman that escaped after the Eugenics Wars of Earth's 20th century. But he's too late: Khan and McGivers have gone back to his ship, revived Khan's crew, and returned to commandeer the Enterprise. Before he's successful, the crew manages to lock out some controls of the ship. Khan attempts to coerce the bridge crew to give him the controls by torturing Kirk in a pressure chamber. They don't relent, and Kirk is believed to have died. However, McGivers had a change of heart and rescued Kirk. Together they initiate an gas attack on Khan's crew, disabling them. Once revived, Kirk realized that Khan's people would be a danger to 23rd century society. He then allows them to colonize a planet, which Lt. McGivers chooses to join them on rather than face a court martial.

"Star Trek" (1966): Season 1: Episode 23 -- The Enterprise is diverted by two planets fighting a computerized war

Season 1, Episode 23: A Taste of Armageddon

Original Air Date—23 February 1967
Kirk and Spock must save their ship's crew when they are declared all killed in action in a bizarre computer simulated war where the actual deaths must occur to continue.

"Star Trek" (1966): Season 1: Episode 24 -- The Enterprise visits a colony where indigenous flower spores provide the settlers with peaceful contentment

Season 1, Episode 24: This Side of Paradise

Original Air Date—2 March 1967
The Enterprise is ordered to Omicron Ceti III, believed to be under constant irradiation from deadly Berthold Rays, in order to evacuate all the colonists. Upon arrival, however, it seems that the colonists are in perfect health and furthermore have no desire to leave their home. They are in fact under the influence of plant spores which are keeping them in good health, and which simultaneously keep them in a placid state of happiness and contentment. Mr Spock meets Leilani, an old friend who had been in love with him. Spock is affected by the spores, and is for the first time able to express his love for her in return. Eventually the entire ship is affected, and Kirk is left alone trying to return his crew to sanity.

"Star Trek" (1966): Season 1: Episode 25 -- An unknown monster threatens a mining operation

Season 1, Episode 25: The Devil in the Dark

Original Air Date—9 March 1967
The Enterprise is sent to a mining colony that is being terrorized by a mysterious monster.

"Star Trek" (1966): Season 1: Episode 26 -- Kirk and Spock battle Klingons to free Organia

Season 1, Episode 26: Errand of Mercy

Original Air Date—23 March 1967
War! The Klingons and the Federation are poised on the brink, and then war is declared. Kirk and Spock visit the planet Organia. Organia, inhabited by simple pastoral folk, lies on a tactical corridor likely to be important in the coming conflict. Whichever side controls the planet has a significant advantage. But the Organians are a perplexing people, apparently unconcerned by the threat of the Klingon occupation or even the deaths of others in their community. Finally, Kirk and the Klingon commander Kor learn why, and the reason will change Federation/Klingon relations for decades to come.

"Star Trek" (1966): Season 1: Episode 27 -- An alien being fights himself across two realities

Season 1, Episode 27: The Alternative Factor

Original Air Date—30 March 1967
While investigating and scanning an uncharted planet the Enterprise and their quadrant of space has been subjected to a violent force which seems to have caused a 'blinking out' of everything near them. When the scan is resumed where once there was no life now there is a life sign on the planet and Kirk, Spock and a security force beam down to investigate and find a man named Lazarus who collapses and is brought aboard Enterprise for treatment. To complicate things further the phenomenon has almost totally drained their dilithium crystals. Starfleet and Kirk suspect that the phenomenon could be a prelude to invasion. While interrogating Lazarus he tells Kirk that he is locked in a struggle with another being who is 'anti life' and is behind the phenomenon. The disruptions continue to occur and the ship's situation grows worse.

"Star Trek" (1966): Season 1: Episode 28 -- Kirk and Spock go back in time to restore history
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Season 1, Episode 28: The City on the Edge of Forever

Original Air Date—6 April 1967
When a temporarily maddened Dr. McCoy alters history and eliminates his time, Kirk and Spock follow him to prevent it, but the price to do so is high.

Season 1, Episode 29: Operation - Annihilate!

Original Air Date—13 April 1967
The Enterprise crew attempt to stop a plague of amoeba-like creatures from possessing human hosts and spreading throughout the galaxy.

Season 2


"Star Trek" (1966): Season 2: Episode 1 -- Spock undergoes the Vulcan mating ceremony

Season 2, Episode 1: Amok Time

Original Air Date—15 September 1967
In the throes of his Pon Farr mating period, Spock must return to Vulcan to meet his intended future wife, betrothed from childhood.

"Star Trek" (1966): Season 2: Episode 2 -- The Enterprise is held captive by the Greek god, Apollo

Season 2, Episode 2: Who Mourns for Adonais?

Original Air Date—22 September 1967
A powerful being claiming to be the Greek god Apollo appears and demands that the crew of the Enterprise disembark onto his planet to worship him.

"Star Trek" (1966): Season 2: Episode 3 -- The Enterprise encounters a probe named Nomad

Season 2, Episode 3: The Changeling

Original Air Date—29 September 1967
A powerful reconstructed artificially intelligent Earth probe with a murderously twisted imperative comes on to the Enterprise and confuses Capt. Kirk as his creator.

"Star Trek" (1966): Season 2: Episode 4 -- Kirk, Scott, McCoy and Uhura enter a parallel universe
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Season 2, Episode 4: Mirror, Mirror

Original Air Date—6 October 1967
Beamed up during an ion storm, which causes a transporter malfunction, the landing party of Kirk, McCoy, Scotty and Uhura find themselves in a mirror universe aboard a parallel Enterprise run by ruthless barbarians. The ion storm also caused their malicious counterparts to beam to the real starship. Kirk and the others must find a way home before they are discovered and exposed by their parallel crew members, who use treachery, back-stabbing and seduction to get what they want.

"Star Trek" (1966): Season 2: Episode 5 -- The crew discovers a paradise controlled by computer

Season 2, Episode 5: The Apple

Original Air Date—13 October 1967
Kirk and a landing party beam down to what seems to be an ideal, Eden-like planet. They soon find however that the planet is ruled by a powerful computer that keeps its local inhabitants - primitive and simple tribesmen - happy and healthy. With the Enterprise locked in a tractor beam and slowly being dragged into the planet's atmosphere, Kirk and Spock must find a way to disable to computer. Realizing the threat to its existence, the computer orders the tribesmen to kill the visitors.

"Star Trek" (1966): Season 2: Episode 6 -- A machine that destroys planets threatens the Enterprise

Season 2, Episode 6: The Doomsday Machine

Original Air Date—20 October 1967
The USS Enterprise encounters the wrecked USS Constellation and its distraught captain determined to stop the giant planet destroying robot ship that killed his crew.

"Star Trek" (1966): Season 2: Episode 7 -- Aliens on a mission of conquest hold the crew captive

Season 2, Episode 7: Catspaw

Original Air Date—27 October 1967
When Kirk and his landing party arrive on the planet below, they are met by eerie mists, a dark castle, witches, goblins and a black cat. They soon learn that they are under the influence of a wizard, Korob, who tries to bend them to his will. They also soon learn that the black cat they saw is more than she appears and is in fact a powerful witch in her right. It is left to Kirk and Spock to find a means to escape their grasp.

"Star Trek" (1966): Season 2: Episode 8 -- A takeover leads Kirk to his old nemesis, Harry Mudd

Season 2, Episode 8: I, Mudd

Original Air Date—3 November 1967
Harry Mudd returns with a plot to take over the Enterprise by stranding the crew on a planet populated by androids under his command.

"Star Trek" (1966): Season 2: Episode 9 -- The shuttlecraft Galileo makes a forced landing on a world with a single human inhabitant

Season 2, Episode 9: Metamorphosis

Original Air Date—10 November 1967
The Enterprise, carrying a critically ill Federation Ambassador Nancy Hedford, encounter a mysterious energy cloud which pulls them down to planet Gamma Canaris N, where they meet a castaway. This young man purports to be Zefram Cochrane, the inventor of the Warp Drive over 100 years ago. But in history he had lived to be 80 years of age before disappearing somewhere in space. Apparently the same energy cloud which brought the Enterprise to the planet also rejuvenated Cochrane, making him effectively immortal. Can Kirk get the Enterprise released on time to get the ambassador the medical help she needs, or is there something else in this situation which might be a solution?

"Star Trek" (1966): Season 2: Episode 10 -- Tensions run high when the Enterprise transports ambassadors to the Babel Conferences

Season 2, Episode 10: Journey to Babel

Original Air Date—17 November 1967
The Enterprise hosts a number of quarrelling diplomats, including Spock's father, but someone on board has murder in mind.

"Star Trek" (1966): Season 2: Episode 11 -- The Enterprise crew becomes embroiled in a local power struggle on a tribal planet

Season 2, Episode 11: Friday's Child

Original Air Date—1 December 1967
The Federation is in competition with the Klingons for an alliance with the inhabitants of Capella IV. The Capellans are a warrior tribe and there is dissension among them as to who to sign the mining rights treaty with. McCoy is familiar with their customs having once spent several months there. When a Capellan, who clearly favors the Klingons, stages a coup, Kirk, Spock and McCoy flee with the now dead leader's wife, who is about to give birth. Meanwhile, the Enterprise receives a distress call from a Federation vessel under attack and, with Scotty in command, leaves orbit.

"Star Trek" (1966): Season 2: Episode 12 -- Accelerated aging affects the senior officers and threatens Kirk's ability to lead

Season 2, Episode 12: The Deadly Years

Original Air Date—8 December 1967
A landing party from the Enterprise is exposed to strange form of radiation which rapidly ages them.

"Star Trek" (1966): Season 2: Episode 13 -- Kirk is determined to hunt down a vampiric entity he failed to destroy in his past

Season 2, Episode 13: Obsession

Original Air Date—15 December 1967
Capt. Kirk obsessively hunts for a mysterious cloud creature he encountered in his youth.

"Star Trek" (1966): Season 2: Episode 14 -- Scotty is implicated in a Jack the Ripper-style murder

Season 2, Episode 14: Wolf in the Fold

Original Air Date—22 December 1967
Kirk and the Enterprise Computer become detectives after Scotty is accused of murdering women on a pleasure planet.

"Star Trek" (1966): Season 2: Episode 15 -- The Enterprise is overrun by furry creatures while tangling with Klingons and bureaucrats

Season 2, Episode 15: The Trouble with Tribbles

Original Air Date—29 December 1967
To protect a space station with a vital grain shipment, Kirk must deal with Federation bureaucrats, a Klingon battle cruiser and a peddler who sells furry, purring, hungry little creatures as pets.

"Star Trek" (1966): Season 2: Episode 16 -- Three disembodied beings wager on fights staged by prisoners abducted from around the galaxy

Season 2, Episode 16: The Gamesters of Triskelion

Original Air Date—5 January 1968
Kirk, Uhura and Chekhov are trapped on a planet where gladiators are enslaved and trained to perform for the amusement of bored, faceless aliens.

"Star Trek" (1966): Season 2: Episode 17 -- Kirk investigates a planet with an Earth-like 1920s gangster culture.

Season 2, Episode 17: A Piece of the Action

Original Air Date—12 January 1968
The Enterprise is investigating a planet visited 100 years ago by the USS Horizon. Kirk, Spock, and McCoy beam down and find themselves in a culture similar to Earth gangs of the 1920's. They are quickly taken prisoner by men in the employ of a mob boss named Bela Oxmyx. He wishes them to give him phasers in exchange for "a piece of the action", and when they refuse Oxmyx puts them under guard. Kirk creates a diversion with a card game called "fizzbin". Without their equipment, the trio must find a way to unite the planet and escape to the Enterprise.

"Star Trek" (1966): Season 2: Episode 18 -- A giant space amoeba threatens the entire galaxy

Season 2, Episode 18: The Immunity Syndrome

Original Air Date—19 January 1968
The Enterprise encounters a gigantic energy draining space organism that threatens the galaxy.

"Star Trek" (1966): Season 2: Episode 19 -- The Klingons provide arms to a peaceful planet and disrupt the balance of power

Season 2, Episode 19: A Private Little War

Original Air Date—2 February 1968
Kirk returns to the planet Neural which he had spent time 13 years before. A friend of his from his previous visit is now leader of his people. While trying to uphold the Federation's prime directive, the Klingons are providing more advanced technology to their enemies.

"Star Trek" (1966): Season 2: Episode 20 -- Telepathic aliens take over Kirk and Spock's bodies

Season 2, Episode 20: Return to Tomorrow

Original Air Date—9 February 1968
The last three members of an ancient race far more advanced than humans, who survive only as disembodied thought, wish to borrow the bodies of Kirk, Spock and Dr. Mulhall.

"Star Trek" (1966): Season 2: Episode 21 -- Enterprise is sent to planet Ekos to investigate a disappearance of Federation historian John Gill

Season 2, Episode 21: Patterns of Force

Original Air Date—16 February 1968
Looking for a missing Federation cultural observer, Kirk and Spock find themselves in a planet whose culture is now modeled on the German Nazi Party of old Earth in the 1930's.

"Star Trek" (1966): Season 2: Episode 22 -- Extra-galactic beings commandeer the Enterprise in an attempt to return home

Season 2, Episode 22: By Any Other Name

Original Air Date—23 February 1968
Kirk, Spock, McCoy and a couple of red shirts beam down to the surface of a planet in answer to a fake distress call. There they are overpowered by a small group of human-looking aliens from the Andromeda galaxy, led by Rojan. Their galaxy will be uninhabitable within a few thousand years, so they intend to conquer ours, to give themselves a new home. The aliens' spacecraft has been damaged by the energy barrier around the galaxy, and need the Enterprise to return home, enhancing its engines so that the journey will "only" take 300 years. They take over the Enterprise using their two main weapons - a paralyzing beam, and a ray that can reduce a person to a grey block of material - revival only being possible if the block is not damaged. After successfully negotiating the energy barrier, the aliens reduce all the crew into the grey blocks, with the exception of Kirk, Spock, McCoy and Scott, who must somehow overcome the aliens, revive the crew and return home.

"Star Trek" (1966): Season 2: Episode 23 -- The Enterprise finds a planet devasted by disease that appears to treat the American flag with great reverence

Season 2, Episode 23: The Omega Glory

Original Air Date—1 March 1968
Responding to a distress signal, Kirk finds Captain Tracey of the USS Exeter violating the prime directive and interfering with a war between the Yangs and the Kohms to find the secret of their longevity.

"Star Trek" (1966): Season 2: Episode 24 -- Enterprise is used to test the new M-5 computer

Season 2, Episode 24: The Ultimate Computer

Original Air Date—8 March 1968
Kirk and a sub-skeleton crew are ordered to test out an advanced artificially intelligent control system that could potentially render them all redundant.

"Star Trek" (1966): Season 2: Episode 25 -- Spock and McCoy are forced to fight in Roman-like games

Season 2, Episode 25: Bread and Circuses

Original Air Date—15 March 1968
While searching for the crew of a destroyed spaceship, the Enterprise discovers a planet whose oppressive government is a 20th-century version of Earth's Roman empire. Kirk, Spock, and McCoy meet the rebels, seemingly sun worshipers, but are quickly kidnapped by the regime. The missing Captain Merrick is revealed as the "First Citizen" and pawn of the regime, but he and the rebels ultimately help Kirk and company to escape. Back on the Enterprise, Uhura observes that the crew's understanding that the rebels are sun worshipers was not completely accurate.

"Star Trek" (1966): Season 2: Episode 26 -- The Enterprise goes back in time and discovers a mysterious stranger trying to interfere with 20th-century events

Season 2, Episode 26: Assignment: Earth

Original Air Date—29 March 1968
When the Enterprise is assigned to observe earths history in 1968, suddenly it intercepts a transporter beam which originates at least a thousand light-years from Earth, bringing aboard a humanoid alien 'agent Gary Seven' holding a black cat called Isis, who warns them to step back and let him go to accomplish his mission to save earth; initially phaser-struck down, he manages to beam himself away, actually on a mission to prevent a nuclear rocket being launched at McKinley base because earth is socio-politically not ready for its technological progress. He assumes a classified identity to override a powerful computer, and hits the wrong girl, Miss Lincoln, he mistook for another agent; the computer reports both other agents he seeks are deceased in an accident. Meanwhile Kirk and Spock beam down to investigate if the alien isn't hostile, realizing the risk of changing their own past. When they get on his trail, the girl sees Spock's ears, calls the police and Seven gets away; they must first beam back aboard, then down to the base looking for Seven who overpowers security and sabotages the missile; however they get caught before Scotty locates Seven and beams him up, but he beams himself back grumbling he wasn't finished...

Season 3


"Star Trek" (1966): Season 3: Episode 1 -- Kirk pursues aliens who have taken Spock's brain

Season 3, Episode 1: Spock's Brain

Original Air Date—20 September 1968
The Enterpise is approached by an ion-propelled craft to Scotty's liking; from it enters a female who renders everyone unconscious, then heads straight to Spock. When the crew wakes up, McCoy finds Spock alive in sick bay, his brain being surgically removed; Doc urges they must hurry to have any chance of putting it back in, if possible at all. Desperately Kirk gambles which planet the ion-trail they tried to follow actually leads to. It is populated by a race of large cavemen who attack; when the landing party captures one, he says they are small like 'the Others' they fear as bringers of pain and delight. McCoy brings down Spock's body with a mechanical brain-substitute installed; they get in the Others' acclimatised dwellings and overpower similar female Luma by surprise, but she knows nothing, having a childish brain. Kirk's voice makes transmitter-contact but ignores where he is; an evil female overpowers the party, now captured and brought before a female panel, already wearing the controlling devices rendering all other males utterly obedient. They realize there is no superior intellect capable of handling the technology to maintain the subterranean complex, and apparently the 'controller' they refer to is actually Spock's brain, which they must find and reunite with his body....

"Star Trek" (1966): Season 3: Episode 2 -- Disguised as a Romulan, Kirk steals a cloaking device

Season 3, Episode 2: The Enterprise Incident

Original Air Date—27 September 1968
The Enterprise deliberately crosses the Neutral Zone, on Kirk's orders, into Romulan space and is promptly surrounded by Romulan warships, each equipped with a "cloaking device" that renders it undetectable. Spock betrays the apparently irrational and paranoid Kirk to the Romulan commander, a woman who is obviously attracted to Spock. A deadly game between Kirk, Spock and the Romulans risks not only the Enterprise but the tenuous cease-fire between the Romulans and the Federation.

"Star Trek" (1966): Season 3: Episode 3 -- Kirk loses his memory and begins a life in a native village

Season 3, Episode 3: The Paradise Syndrome

Original Air Date—4 October 1968
Trapped on a planet whose inhabitants resemble the Northwestern American Indians Kirk loses his memory and is proclaimed a God while the crippled Enterprise races back to the planet before it is destroyed by an asteroid.

"Star Trek" (1966): Season 3: Episode 4 -- A group of children are being controlled by an evil force

Season 3, Episode 4: And the Children Shall Lead

Original Air Date—11 October 1968
The Enterprise reaches a Federation colony where the adults have all killed each other but the children play without care.

"Star Trek" (1966): Season 3: Episode 5 -- The sight of a Medusan ambassador causes insanity

Season 3, Episode 5: Is There in Truth No Beauty?

Original Air Date—18 October 1968
The Enterprise transports the Medusan Ambassador Kollos; his telepathic interpreter, Dr Miranda Jones; and Engineer Laurence Marvick. Only Vulcans and those trained in Vulcan self-control can handle the horrible sight of a Medusan (and then only with eye protection). Attempting to kill Kollos, Marvick (jealous of Miranda's interest in Kollos) goes insane at the sight of the Mudasan ambassador. Before dying Marvick, one of the designers of the Enterprise, takes the ship outside the galaxy where it is hopelessly lost. Once it is discovered that Miranda is blind (she had fooled them with a complicated neural sensor in her dress) and cannot guide the Enterprise, Spock mind-melds with the navigationally proficient ambassador who quickly gets the Enterprise back in known galactic space. However, while severing the mind-meld, he forgets the visor, sees Kollos, and goes insane. Because of her jealousy of Spock's relationship with Kollos, Miranda hesitates to give help, but with Kirk's urging reconsiders and helps Spock take control of his mind.

"Star Trek" (1966): Season 3: Episode 6 -- As punishment for trespassing, Kirk and crew are forced to re-enact the shootout at the OK Corral

Season 3, Episode 6: Spectre of the Gun

Original Air Date—25 October 1968
As punishment for trespassing on their planet, the inhabitants condemn Capt. Kirk and his landing party as the losing side of a surreal recreation of the Gunfight at the OK corral.

"Star Trek" (1966): Season 3: Episode 7 -- A malevolent entity pits Klingons against the Enterprise crew

Season 3, Episode 7: Day of the Dove

Original Air Date—1 November 1968
An entity traps the Enterprise crew and the crew of a disabled Klingon battle cruiser in an unending war aboard the Enterprise.

"Star Trek" (1966): Season 3: Episode 8 -- An inhabited asteroid is on a collision course with a Federation planet

Season 3, Episode 8: For the World Is Hollow and I Have Touched the Sky

Original Air Date—8 November 1968
The Enterprise discovers an apparent asteroid that is on a collision course with a planet is actually an ancient populated generation ship.

"Star Trek" (1966): Season 3: Episode 9 -- Kirk is trapped in interphase, while the Enterprise is trapped by a powerful energy web

Season 3, Episode 9: The Tholian Web

Original Air Date—15 November 1968
Kirk and the derelict starship Defiant vanish into a spatial interphase between universes. To rescue him, Spock must maintain position despite a growing, violent hysteria aboard the Enterprise like that which destroyed the Defiant's crew, as well as a force field being laid around the Enterprise by Tholian patrol ships.

"Star Trek" (1966): Season 3: Episode 10 -- Platonians use psychokinetic power to toy with the crew

Season 3, Episode 10: Plato's Stepchildren

Original Air Date—22 November 1968
On an urgent medical emergency Kirk, Spock and McCoy encounter an alien society who had once flourished on earth during the time of Plato. Since reaching their current planet they had developed psychokinetic powers while also losing the ability for their bodies to combat even the simplest infections. When Doctor McCoy refuses their offer to stay, they begin make sport with Kirk, McCoy, Nurse Chapel and Lieutenant Uhura using their psychokinetic powers.

"Star Trek" (1966): Season 3: Episode 11 -- Hyperaccelerated aliens, invisible to the naked eye, take over the Enterprise

Season 3, Episode 11: Wink of an Eye

Original Air Date—29 November 1968
The Enterprise responds to a distress call from the planet Scalos but when Kirk and a landing party beam down to the planet, they find no living beings. It turns out that Scalosian live at a much higher rate of acceleration rendering them invisible to the human eye. One of the Scalosians, the beautiful and seductive Deela, accelerates Kirk so they can interact and tells him he cannot return to his normal life. For the crew, Kirk has virtually disappeared before their eyes. The Scalosians want to turn the Enterprise into a cryogenic storage facility for the crew. Kirk learns that at his current state of acceleration, they are subject to cellular degeneration and rapid aging should they suffer the slightest cut. He leaves a message for the crew but it is left to Mr. Spock to find a way to decipher it.

"Star Trek" (1966): Season 3: Episode 12 -- The landing party is used to test an empathic race

Season 3, Episode 12: The Empath

Original Air Date—6 December 1968
Trapped in an alien laboratory Kirk, Spock and McCoy meet an empath and are involved in a series of experiments.

"Star Trek" (1966): Season 3: Episode 13 -- Kirk is distracted while the Enterprise is threatened

Season 3, Episode 13: Elaan of Troyius

Original Air Date—20 December 1968
The Enterprise transports Elaan, the female ruler of the warrior Troyians, to the planet of her enemy so that her arranged marriage will halt their interplanetary war. Kirk must teach the arrogant, vicious ruler the ways of polite society but falls victim to the legendary weapon of Troyian women: their tears act as a love potion. Spock tracks what may be another ship shadowing the Enterprise and Kirk, distracted by Elaan, must fight against other parties interested in preventing the Federation's peace efforts.

"Star Trek" (1966): Season 3: Episode 14 -- Kirk is confronted by one of his heroes, now criminally insane

Season 3, Episode 14: Whom Gods Destroy

Original Air Date—3 January 1969
Kirk and Spock are taken prisoners by a former starship captain named Garth, who now resides at, and has taken over, a high security asylum for the criminally insane.

"Star Trek" (1966): Season 3: Episode 15 -- Two survivors of a devasted planet remain committed to destroying one another

Season 3, Episode 15: Let That Be Your Last Battlefield

Original Air Date—10 January 1969
The Enterprise encounters two duo-chromatic and mutually belligerent aliens who put the ship in the middle of their old conflict.

"Star Trek" (1966): Season 3: Episode 16 -- Kirk is abducted by aliens who wish to use him to help solve their overpopulation problem

Season 3, Episode 16: The Mark of Gideon

Original Air Date—17 January 1969
Kirk beams down to the planet Gideon and appears to find himself trapped on the deserted Enterprise. Spock on the real Enterprise must use his diplomatic skills to deal with the uncooperative inhabitants of Gideon to find the Captian.

"Star Trek" (1966): Season 3: Episode 17 -- A deadly computer image protects a long dead outpost

Season 3, Episode 17: That Which Survives

Original Air Date—24 January 1969
After the Enterprise landing party beams down to investigate a geologically interesting planet, their ship is hurled across the galaxy. Kirk and company find a deserted outpost guarded by the deadly image of a beautiful woman.

"Star Trek" (1966): Season 3: Episode 18 -- Zetarians threaten Lieutenant Mira Romaine

Season 3, Episode 18: The Lights of Zetar

Original Air Date—31 January 1969
The Enterprise is on course to install new equipment on Memory Alpha, the central library storage facility for the Federation. Chief Engineer Scott has been working closely on the project with Lieutenant Mira Romaine with whom he has been forming a romantic attachment. The Enterprise encounters a space storm that kills the staff at Memory Alpha and possesses Lieutenant Mira Romaine.

"Star Trek" (1966): Season 3: Episode 19 -- Kirk and crew meet an immortal human named Flint

Season 3, Episode 19: Requiem for Methuselah

Original Air Date—14 February 1969
When Kirk, Spock and McCoy beam down to a supposed uninhabited planet to gather the mineral ryetalyn to fight a plague of Rigelian fever on-board the Enterprise, they find a fellow earth-man called Flint and his extremely intelligent female ward Rayna who Kirk begins to fall in love with. Flint then proceeds to trap them on his planet and takeover the Enterprise.

"Star Trek" (1966): Season 3: Episode 20 -- A charismatic leader and his followers hijack the Enterprise in their search for "Eden"

Season 3, Episode 20: The Way to Eden

Original Air Date—21 February 1969
The Enterprise is ordered to pursue a group of anti-establishment idealists who have stolen a space cruiser and made off for the mythical planet Eden. When the group pushes their stolen ship beyond its limits, the Enterprise is forced to rescue them by transporting them aboard. This merry band of space-hippies includes the insane leader (Dr. Sevrin), an academy drop-out and former love interest of Chekov (Irina), and the son of a Catullan ambassador (Tongo Rad). With the Federation undergoing fragile treaty negotiations with the Catullans, Kirk is ordered by Starfleet to treat the dissidents with "extreme tolerance." Kirk finds the group and its leader too difficult to deal with while Spock maintains a deep curiosity about their ideals. Kirk appoints Spock as liaison for the group during their stay on the Enterprise. Dr. Sevrin demands to be taken to Eden, but Kirk refuses on the grounds that his orders from Starfleet dictate that the group be taken to the nearest star base. While investigating this strange group of free spirits, Dr. McCoy and Mr. Spock discover that not only is Dr. Sevrin insane, he is also the carrier for a potentially lethal disease. His desire to abandon technology and join the "primitive" inhabitants of planet Eden could well result in their destruction. As a precaution, Dr. Sevrin is quarantined, but Spock agrees to plot a course to the mythical planet of Eden in exchange for his cooperation. Meanwhile, Chekov inadvertently gives away some vital information about auxiliary control to his former classmate, Irina, and she and the rest of Sevrin's followers soon free him and commandeer the Enterprise. The group takes the Enterprise to Eden (which, to complicate matters, happens to be in Romulan space), establish orbit and steal a shuttle craft to land on the surface while the Enterprise crew is incapacitated. But the planet, while as beautiful as any of them imagined, also has a deadly side.

"Star Trek" (1966): Season 3: Episode 21 -- Kirk is forced into negotiating peace on a planet with severe class inequities

Season 3, Episode 21: The Cloud Minders

Original Air Date—28 February 1969
Kirk and Spock are caught up in a revolution on a planet where intellectuals and artists live on a utopian city in the sky while the rest of the population toils in mines on the barren surface below.

"Star Trek" (1966): Season 3: Episode 22 -- Kirk and Spock are forced into a battle of good and evil

Season 3, Episode 22: The Savage Curtain

Original Air Date—7 March 1969
Kirk, Spock, Abraham Lincoln, and Surak are pitted in battle against four notorious villains from history for the purpose of helping a molten rock creature's understanding of a concept he does not understand, 'good verses evil'.

"Star Trek" (1966): Season 3: Episode 23 -- Kirk, Spock and McCoy enter a time portal and get stuck in the past on a planet about to be consumed by a nova

Season 3, Episode 23: All Our Yesterdays

Original Air Date—14 March 1969
When the planet Sarpeidon is about to be destroyed by its star Beta Niobe becoming a supernova, Kirk, Spock and McCoy beam down and find it evacuated except for Atoz, its librarian, tending with his replicas a collection of unusual discs, which play the planet's history and (to their surprise) allow their users to travel into the past trough the atavachron, a time machine, into the periods each was studying on disc, but they jump in unprepared. McCoy and Spock find themselves locked in a planetary ice age 5,000 years ago, where Spock reverts to the barbaric age of the Vulcans, hence touchy and intensely attracted to the political exilee Zarabeth, who enjoys getting company but tells them return is impossible. Kirk lands in a Cromwellian period, where he's arrested and suspected of witchcraft, but realizes the magistrate must be a time traveler like him, and learns not being prepared at molecular level he can return trough the time portal, and in fact must do so and contact Spock and Bones in a matter of hours; they must all return to the present and board the Enterprise before the exploding sun destroys the atavachron...

"Star Trek" (1966): Season 3: Episode 24 -- A woman from Kirk's past exchanges bodies with him and takes control of the ship

Season 3, Episode 24: Turnabout Intruder

Original Air Date—3 June 1969
The Enterprise is answering a medical emergency of an archaeological expedition. Kirk is confronted with the deep hatred of an old love, Janice Lester, who is severely ill from celebium radiation. As payment for jilting her, Dr Lester arranges for an alien machine to swap the consciousness of Kirk and herself in order for her to take command of the Enterprise. On board the Enterprise, Kirk (in Lester's body) tries to convince Spock that he is trapped in Janice's body. As a result, Janice (in Kirk's body) conducts a court-marshal with the intent of executing Spock, McCoy, Scotty, and Kirk (in Janice's body) to keep her secret. The crew realizing something is wrong with their captain does not cooperate.

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