THE CSI TEAM'S ALLEGIANCES ARE TESTED WHEN LANGSTON IS IDENTIFIED AS A POSSIBLE SUSPECT IN THE DR. JEKYLL MURDER INVESTIGATION, ON "CSI: CRIME SCENE INVESTIGATION," THURSDAY, MAY 13

Bill Irwin ("Rachel Getting Married") Returns As Nate Haskell, The Infamous "Dick and Jane" Killer

Part One of a Two-Part Season Finale

"Doctor Who" - The CSI team must investigate one of their own when Langston is accused by a former colleague of being part of the Dr. Jekyll murders, on part one of a two-part season finale of CSI: CRIME SCENE INVESTIGATION, Thursday, May 13 (9:00-10:00 PM, ET/PT) on the CBS Television Network. Bill Irwin ("Rachel Getting Married") returns as Nate Haskell, the infamous "Dick and Jane" killer, who may have valuable information about the case.

SERIES REGULARS:

Dr. Raymond Langston...... Laurence Fishburne
Catherine Willows.............. Marg Helgenberger
Nick Stokes................................ George Eads
Captain Jim Brass....................... Paul Guilfoyle
Greg Sanders.............................. Eric Szmanda
Dr. Robbins......................... Robert David Hall
David Phillips............................. David Berman
Hodges................................ Wallace Langham
Wendy Simms................................. Liz Vassey

RECURRING CAST:

Sara Sidle......................................... Jorja Fox

GUEST CAST:

Conrad Ecklie................................ Marc Vann
Archie Johnson.............................. Archie Kao
Officer Mitchell.......................... Larry Mitchell
Nate Haskell...................................... Bill Irwin
Vince Grady..................................... Jeff Perry
Lou Brennan.............................. David Boswell
Heidi Custer............................... Monet Mazur
Female Clerk....................... Susan Rhea Lynch
Aaron Custer................................ Scott Cohen

WRITTEN BY: Tom Mularz

DIRECTED BY: Jeffrey Hunt

RATING: To Be Announced