The CSIs are faced with one of their most puzzling cases yet when, arriving at the scene of a car crash, they find three casualties and a human brain that doesn’t belong to any of the victims.
Meanwhile, Russell is concerned about his son's sense of focus following his suspension from school.
The CSIs attempt to solve a string of murders connected to a cache of stolen casino chips. Will Ray have to use deadly force?
The CSI team investigates a brutal motorcycle gang murder in a biker bar and, due to the nature of the killing, there are multiple suspects.
The bizarre murder of a popular sideshow performer sends the team behind the scenes at a 19th-century-inspired freak show.