Stephen Sowan

Teenagers fill the ER after a school-bus crash; Bailey treats a patient who was her high-school crush; Derek goes on a date with a fellow doctor; Thatcher enters the ER looking for Meredith.

Patrick Jane and Kristina Frye's first date is interrupted by a report of Red John striking again – which is discovered to be a copycat. But when Kristina reaches out to the real Red John, both she and Jane find themselves in grave danger, on the second season finale cliffhanger.

Addison and Sam perform urgent field care when, while out hiking, they stumble across a couple trapped in their car after an accident.

When the team discovers a connection between a new murder and a serial killer, Grissom secretly joins the class of a criminal pathologist (Laurence Fishburne) to help crack the case.

The CSI team delves into the world of political corruption when a corporate fixer is murdered.