A MURDER INVESTIGATION LEADS THE NCIS TEAM TO A BOMB PLANTED IN QUANTICO AND A LONG-RUNNING THEFT RING, ON "NCIS," TUESDAY, SEPT. 27

"Being Bad" - NCIS uncovers a bomb plot and a long-running theft ring while investigating a death at a Quantico reunion. Also Torres and Quinn adjust to life on Gibbs' team, including new seating arrangements in the squad room, on NCIS, Tuesday, Sept. 27 (8:00-9:00, ET/PT), on the CBS Television Network.

REGULAR CAST:

Mark Harmon (NCIS Special Agent Leroy Jethro Gibbs)
Pauley Perrette (Forensic Specialist Abby Scuito)
Sean Murray (NCIS Special Agent Timothy McGee)
Wilmer Valderrama (NCIS Special Agent Nicholas "Nick" Torres)
Jennifer Esposito (NCIS Special Agent Alexandra "Alex" Quinn)
Brian Dietzen (Jimmy Palmer)
Emily Wickersham (Probationary Agent Eleanor "Ellie" Bishop)
Duane Henry (MI6 Officer Clayton Reeves)
Rocky Carroll (NCIS Director Leon Vance)
David McCallum (Dr. Donald "Ducky" Mallard)

GUEST CAST:

Vernée Watson (Miss Helen Frimkes)
John Kapelos (Vice Principal Vic Castor)
Braden Lynch (Neal Sherwood)
Joshua LeBar (Adam Cooper)
Devin Sidell (Dark Woman A.K.A. Angela Russell)
Amy Gumenick (Katrina Cooper)
Mike Falkow (Jim Bruno)
Conner Marx (Milo Torbush A.K.A. Buddy)

WRITTEN BY: Steven D. Binder

DIRECTED BY: James Whitmore, Jr.