NCIS: Twisted Sister

Episode 9 | Season 4 2006 - 2007 | First Aired: 11/21/2006

Synopsis:

McGee's sister shows up on his doorstep covered in blood. When McGee starts investigating to find out what happened, he crosses paths with his team investigating a murder. McGee and the team work to prove his sister didn't kill anyone. Meanwhile, Tony worries about screwing things up with his new girlfriend.

Terrence O'Hara

Director

Mark Harmon

Leroy Jethro Gibbs

David McCallum

Dr. Donald "Ducky" Mallard

Pauley Perrette

Abby Sciuto

Michael Weatherly

NCIS Special Agent Anthony "Tony" DiNozzo

Cote De Pablo

Ziva David, Mossad Liaison