|Turn Of The Screws|
|Writer||Story: Richard Catalani & Carol Mendelsohn|
Teleplay: Josh Berman
|Original Airdate||May 6, 2004|
|Previous Episode: Dead Ringer|
|Next Episode: No More Bets|
Turn Of The Screws is the twenty first episode of season 4 of CSI: Crime Scene Investigation
Grissom, Sara and Nick investigate when a roller coaster derails at an amusement park, leaving six people dead. When it turns out there were only five people on the roller coaster, they suspect foul play. Catherine and Warrick investigate the murder of a 13-year old girl.