- The death of a scientist is connected to a time machine he allegedly created, while the death of a co-ed at a diner is connected to a drug study at her school and an initiation ceremony.
- When a man covered in blood falls dead shortly after claiming he is from the future and that he kills someone tomorrow, the CSIs believe the man is crazy until they find his time machine and his murder prophecy comes true. The CSIs discover the "mad" scientist was really a math genius with a brain condition that made him think he was seeing the future instead of mathematically predicting it. The brain condition was caused by a sewing needle lodged in his brain, which the M.E. believes became accidentally inserted when he was an infant. The death he predicts is that of his assistant, a physics major at the scientist's alma mater. The day after the scientist's death, the assistant uses the time machine created by the scientist and is electrocuted, then falls out of a window and lands on the street during a parade. The CSIs find evidence of another man at the crime scene. They locate the man and find out he killed the scientist because he would not use the machine to predict gambling odds, as he had asked him to. After he found out the scientist had died, he forced the assistant to use the machine again, and when it did not go as planned, pushed him out of the window to his death. The man ends up charged with both the murder of the scientist and his assistant. Meanwhile, Stella and Danny investigate a twisted case of a young woman's death by orgasm. They find out a fellow student replaced the girl's asthma inhaler canister with another canister filled with an experimental sexual enhancement drug. The fellow student was a member of a sorority the girl was pledging to and was trying to induce sexual arousal in the victim so that she would be more likely to lose her virginity, which was a requirement to join the sorority. The drug interacts with her asthma and causes her death. The girl tells the CSIs it was just a harmless game. Nevertheless, she is arrested and charged with manslaughter. At the end of the show, Mac receives a "Dear John" letter from Peyton in London. She has decided to stay in London and is saying goodbye. The last scene shows him playing guitar onstage in a band. Stella watches him from the crowd.
Contribute to this page
Suggest an edit or add missing content