The helicopter's black switch-box for its hologram-spheres is prominently labeled "PROJECTOR" in bold white letters, yet when Jaime reaches down and flips the switch on, the box is plain and unlabeled.
The hologram-generator switch is already flipped down, yet when Jaime reaches down to switch it on, the switch is in the "up" position, and she flips it down to turn on the projected UFO-image.
Jaime and the stunt woman doing her jump up the cliff are wearing different shoes.
The UFO is initially shown with a fin-like antenna in the rear, but in later images, it just has a plain rounded back.
Shooting a moving object from another moving object is no "easy shot". With a revolver only a lucky shot would hit.
Obviously an animated rock that is semi-transparent and shifts and bobs erratically as it approaches the helicopter.
Large motionless dirt-specks are visible in some of the "closeup" shots of the UFO in a stationary position as the scenery moves past "below" it. Obviously a multi-packed (multiple-layered) film scene with the UFO image printed on a transparent filter, and someone carelessly neglected to clean off the foreign matter from the clear glass filming-plates before they were stacked to create these shots.
As Jaime is running from the UFO, the superimposed vehicle gets so close to her that you can see her shoulder and hand moving behind it instead of in front. Also, as Jaime tumbles down a hill the scene changes yet the UFO remains in exactly the same place.
Plainly visible shadows of the filming-helicopter's whirling rotor-blades throughout the episode; they are particularly obvious in the shot of Jaime splashing through the creek with the "UFO" hovering above and beside her.
Jaime sees that the switch for the helicopter's hologram-spheres is marked "projector", but she mis-reads it as "projection".
When she drives to the pier to meet Oscar, Jaime parks illegally, with her car's front end well over the parking lines. Jaime is specifically trained to remain cool and calm under stressful/intense situations, so she surely would have thought to park correctly, especially since she herself is someone who helps to enforce the law.
The female TV reporter says that everyone described the UFO as being "orange in color", even though the saucer is always shown as being bright red, the same general color as the saucer's "tractor beam" that lifts the two men off the pier, and is described correctly as being red. The eye-witnesses would not likely have misidentified the color of the huge continuously-visible craft but then gone on to correctly specify the smaller briefly-seen beam's color.