THE NCIS TEAM SEARCHES FOR A HOME-GROWN TERRORIST AFTER EVIDENCE REVEALS HIS ROLE IN THE CAPTURE OF A SOCIAL WORKER IN SYRIA, ON "NCIS," TUESDAY, JAN. 13

Joe Spano Guest Stars As Senior FBI Agent T.C. Fornell and Marisol Nichols Guest Stars as ATF Special Agent Zo� Keates

"The Enemy Within" - The NCIS team searches for a home-grown terrorist after a rescue mission in Syria reveals an American was involved in the capture of a social worker. Meanwhile, McGee and Bishop question DiNozzo's unusual behavior, on NCIS, Tuesday, Jan. 13 (8:00-9:00, ET/PT), on the CBS Television Network. Joe Spano guest stars as Senior FBI Agent T.C. Fornell and Marisol Nichols guest stars as ATF Special Agent Zo� Keates.

REGULAR CAST:

Mark Harmon (NCIS Special Agent Leroy Jethro Gibbs)
Michael Weatherly (NCIS Special Agent Anthony "Tony" DiNozzo)
David McCallum (Dr. Donald "Ducky" Mallard)
Pauley Perrette (Abby Sciuto)
Sean Murray (NCIS Special Agent Timothy McGee)
Rocky Carroll (NCIS Director Leon Vance)
Brian Dietzen (Jimmy Palmer)
Emily Wickersham (Probationary NCIS Agent Eleanor "Ellie" Bishop)

GUEST CAST:

Joe Spano (Senior FBI Agent T.C. Fornell)
Marisol Nichols (ATF Special Agent Zo� Keates)
Lindsey Kraft (Sarah Goode)
Stephanie Erb (Rachel Nasry)
Arlen Escarpeta (Former Army Specialist Randall White)
Sterling Macer, Jr. (Homeland Assistant Director Chris Hegarty)
Rachel DiPillo (Chelsea)
Darryl Alan Reed (Cabbie)
Kevin Joy (Kyle Nasry)
Zadran Wali (Imam Musa Ibn Hasan)
A.J. Castro (Seal Team Leader)
Paul A. Magers (Newscaster)

WRITTEN BY: George Schenck and Frank Cardea

DIRECTED BY: James Whitmore, Jr.