William Langan

The BAU hunts an UnSub in Phoenix who is kidnapping victims and depriving them of sleep. Also, Hotch and Garcia deal with the threat from the underground hitman group, the "Dirty Dozen."

When a woman is slashed to death, detectives learn that she wanted her late father to be cryogenically frozen.

Don and his team work to track down a serial rapist who is using his position as a police officer to lure his victims.

The fate of the U.S. government is at stake as Avery and the Cyber team search for the hacker responsible for the largest breach of highly classified data in history after millions of federal employee files are stolen. Also, Avery and her ex-husband have a heart-to-heart and D. B. considers a future with Greer, on the second season finale of CSI: CYBER.