WHILE PURSUING A DANGEROUS ARMS DEALER, THE TEAM IS SHOCKED WHEN BISHOP IS IMPLICATED IN AN OLD NSA LEAK, AND THE KILLER GIBBS AND MARCIE HAVE BEEN TRACKING MAY BE ONTO THEM, ON THE 18TH SEASON FINALE OF "NCIS" TUESDAY, MAY 25

Pam Dawber Returns as Investigative Journalist Marcie Warren

"Rule 91" - While pursuing a dangerous arms dealer, the team is shocked when Bishop is implicated in an old NSA leak. Also, Gibbs and Marcie (Pam Dawber)
realize that the killer they've been tracking may be onto them, on the 18th season finale of NCIS, Tuesday, May 25 (8:00-9:00 PM, ET/PT), on the CBS Television Network.

REGULAR CAST:

Mark Harmon (NCIS Special Agent Leroy Jethro Gibbs)
Sean Murray (NCIS Special Agent Timothy McGee)
Emily Wickersham (NCIS Special Agent Eleanor "Ellie" Bishop)
Wilmer Valderrama (NCIS Special Agent Nicholas "Nick" Torres)
Brian Dietzen (Medical Examiner Jimmy Palmer)
Diona Reasonover (Forensic Scientist Kasie Hines)
Rocky Carroll (NCIS Director Leon Vance)
David McCallum (Dr. Donald "Ducky" Mallard)

GUEST CAST:

Pam Dawber (Marcie Warren)
Katrina Law (NCIS REACT Special Agent Jessica Knight)
Rafael Petardi (Afrim Murati)
Elayn J. Taylor (Odette Malone)
Donzaleigh Abernathy (NSA Deputy Director Ronda Ellis)

WRITTEN BY: David J. North and Brendan Fehily

DIRECTED BY: Diana Valentine