CSI discovers that a woman may have been murdered, and her head mounted on a wall as a trophy, because the killer was convinced that she was actually a powerful alien reptile.
When the police arrive at the ranch of Hank Connors, he resists shooting from the windows first and then he commits suicide when the SWAT invade the house. The CSI team arrives to investigate the disappearance of Chyna DeVere and her husband Preston. Warrick notes that Hank's hobby was taxidermy and soon Grissom finds the head of Chyna mounted on the wall. Grissom also finds books about aliens, UFOs and the reptilian conspiracy. When Brass interviews Hank's friend Shannon Turner, he realizes that he is dealing with a group of crazy people.—Claudio Carvalho, Rio de Janeiro, Brazil