Csi Las Vegas 7x1 ●

William Petersen (Gil Grissom), Marg Helgenberger (Catherine Willows), Gary Dourdan (Warrick Brown), George Eads (Nick Stokes), and Jorja Fox (Sara Sidle).

The episode features a musical performance by John Mayer . Cast & Crew: Director: Kenneth Fink Writers: David Rambo and Naren Shankar CSI Las Vegas 7x1

This episode is pivotal because it features the first "calling card" of the season's primary antagonist. At one of the crime scenes, investigators discover an of the scene, meticulously crafted down to the smallest detail. This marks the beginning of a season-long hunt for the serial killer who creates these dioramas. Key Episode Details William Petersen (Gil Grissom)