IT'S NO LAUGHING MATTER FOR THE TEAM WHEN A PRACTICAL JOKE-LOVING MARINE TURNS UP DEAD ON HALLOWEEN EVE, ON "NCIS," TUESDAY, OCT. 20

"Code of Conduct" - When a Marine known for his practical jokes is found dead on Halloween eve, the NCIS team discovers that the victim's "good-natured" pranks may have inspired ghoulish retribution. Meanwhile, Ziva tries to adjust to her new role on the team, on NCIS, Tuesday, Oct. 20 (8:00-9:00 PM, ET/PT) on the CBS Television Network.

SERIES REGULARS:

NCIS Special Agent Leroy Jethro Gibbs ................ Mark Harmon
NCIS Special Agent Anthony DiNozzo ........... Michael Weatherly
Dr. Donald "Ducky" Mallard.................. David McCallum
Abby Sciuto............................. Pauley Perrette
NCIS Special Agent Timothy McGee ....................... Sean Murray
Ziva David, Former Mossad Liaison....................... Cote de Pablo
NCIS Director Leon Vance....... Rocky Carroll

RECURRING CAST:

Jimmy Palmer.............................. Brian Dietzen

GUEST CAST:

Sara Korby....................... Stefanie von Pfetten
Rachael Sparks.......................... Brooke Nevin
Marine Sergeant Ross Barnes ................... McKinley Freeman
Marine Private David Singer ................... Brian Patrick Wade
Ted Rogers................................ Perry Anzilotti
"Speak"....................................... Teo Olivares
"See".............................. Daniel Lee Robertson
"Hear"..................................... Patric Knutsson
Ballerina #1............................. Mona Patterson
Ballerina #2.................................. Lu Patterson

DIRECTED BY: Terrence O'Hara

STORY BY: Christopher J. Waild

TELEPLAY BY: Reed Steiner & Christopher J. Waild

RATING: TTV14-L