Pictured: Julie Chen (U.S. Ambassador Nancy Kelly), Joe Nieves (FBI Special Agent Brad Reese), Eric Christian Olsen (LAPD Liaison Marty Deeks), Daniela Ruah (Special Agent Kensi Blye), Chris O'Donnell (Special Agent G. Callen) and LL COOL J (Special Agent Sam Hanna). After U.S. Ambassador Nancy Kelly narrowly escapes a terrorist attack at the U.S. Consulate in Tunisia, Callen and Sam are sent on a secret, dangerous mission to obtain key evidence from the crime scene. Upon their return, the team seeks Kelly's help to provide missing information, on NCIS: LOS ANGELES, Monday, Jan. 19 (10:00-11:00 PM, ET/PT) on the CBS Television Network. Julie Chen, Host of "The Talk," guest stars as U.S. Ambassador Nancy Kelly. Photo: Robert Voets/CBS ©2014 CBS Broadcasting, Inc. All Rights Reserved.