GRISSOM RETURNS FROM SABBATICAL AS KEPPLER AND THE REST OF THE CSI TEAM INVESTIGATE A DOUBLE MURDER CASE WITH TIES TO KEPPLER'S SECRET PAST, ON "CSI: CRIME SCENE INVESTIGATION," THURSDAY, FEB. 8, 9:00-10:00 PM, ET/PT

Tony Award Winner Liev Schreiber ("Glengarry Glen Ross," "The Manchurian Candidate," "RKO 281") Returns

Tony Award Winner Len Cariou ("Sweeney Todd") Guest Stars

"Law of Gravity" -- Grissom returns from his teaching sabbatical as Keppler tries to conceal his ties to a double murder case that he and his CSI colleagues are investigating, on CSI: CRIME SCENE INVESTIGATION, Thursday, Feb. 8 (9:00-10:00 PM, ET/PT) on the CBS Television Network. Richard J. Lewis, one of the series' supervising producers, directed the episode written by Richard Catalani & Carol Mendelsohn, one of the series' executive producers, based on a teleplay by Catalani.

Tony Award winner Liev Schreiber ("Glengarry Glen Ross," "The Manchurian Candidate," "RKO 281") returns as Michael Keppler, a seasoned CSI who is new to Las Vegas and is assigned to the night shift during Grissom's teaching sabbatical. Tony Award winner and nominee Len Cariou (won for: "Sweeney Todd" in 1979, nominated for: "Applause" and "A Little Night Music") guest stars as Frank McCarty, retired Trenton, N.J. cop who is closely connected to Keppler's past.

Keppler desperately wants to keep his dark past hidden from his new CSI colleagues. As a result, he fails to disclose that he not only knows Frank McCarty (Cariou), the retired police officer who reportedly found the remains of his cop friend and a prostitute in the friend's Las Vegas hotel room, but that Frank may have had a role in the murders.

SERIES REGULARS:

Gil Grissom: William Petersen
Catherine Willows: Marg Helgenberger
Warrick Brown: Gary Dourdan
Nick Stokes: George Eads
Captain Jim Brass: Paul Guilfoyle
Sara Sidle: Jorja Fox
Greg Sanders: Eric Szmanda
Dr. Robbins: Robert David Hall
Sofia Curtis: Louise Lombard
Hodges: Wallace Langham

RECURRING CAST:

Michael Keppler: Liev Schreiber
David Phillips: David Berman
Wendy Simms: Liz Vassey
Officer Mitchell: Larry Mitchell
Archie Johnson: Archie Kao
Officer Metcalf: Joseph Patrick Kelly
Judy Tremont: Victoria Prescott

GUEST CAST:

Frank McCarty: Len Cariou
Amy McCarty: Kayla Mae Maloney
"Weird Kevin" Reeder: Shacolby Randell
Fran: Baadje-Lyne Odums
Eric "Precious Ricky" Hong: James Hiroyuki Liao
Dorothy McFarland: Toy Connor
P.J. Turner: Brian Klugman
Suzy Gibbons: Katherine Kirkpatrick
Paramedic Rivera: Adrian R'Mante

RATING: TV-14-DLV