CSI EPISODE GUIDE: SEASON 12
12 x 01: 73 Seconds
Multiple shootings and stabbings on a public tram leave the CSI team with one witness and a lot of questions. (First aired: 9/21/2011)
12 x 02: Tell Tale Hearts
Three suspects come forward with three different reasons why they killed an entire family and the CSI team has to determine who is telling the truth. (First aired: 9/28/2011)
12 x 03: Bittersweet
While on a date, Stokes realizes a piece of art at an exhibit has decomposing body parts in it, which leads to a full-blown investigation. Also, D.B. Russell makes a decision to ground one of the staff from the case. (First aired: 10/05/2011)
12 x 04: Maid Man
The former Mayor of Las Vegas is shot at the Mob Museum and the CSIs embark on a history lesson in search of clues. (First aired: 10/12/2011)
12 x 05: CSI Down
When a hijacked medevac helicopter with CSI Brody aboard goes missing, the entire team is on hunt. (First aired: 10/19/2011)
12 x 06: Freaks & Geeks
When a Jane Doe is found near the freakish attractions of a 19th-century-inspired traveling sideshow, the team investigates a cast of unusual characters. (First aired: 11/02/2011)
12 x 07: Brain Doe
When the CSI team arrives at a car crash, they find three casualties and a human brain that doesn’t belong to any of the victims. Also, D.B. Russell is concerned his son is not focused on college following his suspension from school. (First aired: 11/09/2011)
12 x 08: Crime After Crime
When the CSI team investigates three seemingly unrelated murders, they discover someone is getting revenge for cold case murders that were never solved. (First aired: 11/16/2011)
12 x 09: Zippered
When the CSI team discovers a deceased rancher was also a ballistics expert, they have to work with the FBI to solve the case. (First aired: 12/07/2011)
12 x 10: Genetic Disorder
When the body of a naked dead man is discovered by Dr. Robbins’ wife in their master bedroom, it leads to a lot of questions for the CSI team. (First aired: 12/14/2011)
12 x 11: Ms. Willows Regrets
When Willows works with the FBI again after a professional hit occurs at a law firm she recommended to her friend, the CSI team identifies shocking similarities at the crime scene. (First aired: 01/18/2012)
12 x 12: Willows In The Wind
The CSI team says goodbye to Catherine Willows as she makes a life-changing decision. (First aired: 01/25/2012)