MCGEE PUTS HIS NCIS CAREER ON THE LINE TO HELP HIS SISTER WHEN SHE APPEARS ON HIS DOORSTEP BLOODIED AND DISORIENTED, ON "NCIS," TUESDAY, NOV. 21

"Twisted Sister" -- Forgoing NCIS procedure, McGee risks his career when he takes matters into his own hands after his sister appears at his door bloodied and confused, on NCIS, Tuesday, Nov. 21 (8:00-9:00 PM, ET/PT) on the CBS Television Network. Terrence O'Hara directed the episode from a script by Steven D. Binder.

As McGee struggles to piece together his sister's whereabouts the night before, he discovers that the NCIS team is investigating the murder of a Navy sailor who had a previous relationship with his sister. Meanwhile, as separate clandestine romantic relationships bloom for both Abby and Tony, the NCIS team discovers McGee has a secret of his own.

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, Mossad Liaison: Cote de Pablo
NCIS Director Jenny Shepard: Lauren Holly

RECURRING CAST:

Jimmy Palmer: Brian Dietzen
NCIS Special Agent Michelle Lee: Liza Lapira
Jeanne Benoit: Scottie Thompson

GUEST CAST:

Sara McGee: Troian Bellisario
Carolyn: April Matson
Madison: Katherine Bailess
Officer Samuel Tate: John Cabrera
Jordan Block: Fidel Gomez

RATING: TV14-L