|Writer||Ethlie Ann Vare|
|Original Airdate||March 11, 2004|
|Previous Episode: Getting Off|
|Next Episode: Bad To The Bone|
XX is the 17th episode of season 4 of CSI: Crime Scene Investigation
Catherine, Sara and Nick investigate when the body of a female prison inmate is found tied to the underside of a bus. What first looks like an escape gone wrong turns out to be a murder when it is discovered the woman was already dead before she was tied to the bus. Meanwhile Grissom and Warrick investigate the death of a man stabbed to death in his apartment.