Pictured: Eric Christian Olsen (LAPD Liaison Marty Deeks), LL COOL J (Special Agent Sam Hanna), Renée Felice Smith (Intelligence Analyst Nell Jones), Barrett Foa (Tech Operator Eric Beale), Daniela Ruah (Special Agent Kensi Blye), Chris O'Donnell (Special Agent G. Callen), and Miguel Ferrer (NCIS Assistant Director Owen Granger). The NCIS: LA team discovers that one of their own is compromised when they investigate the murder of a Navy contractor involved in illegal transactions of confidential data. Meanwhile, Hetty is under investigation in Washington, D.C., when the Department of Justice arrives in L.A. to investigate the team, on NCIS: LOS ANGELES, Monday, Oct. 6 (9:59-11:00, ET/PT), on the CBS Television Network Photo: Ron P. Jaffe/CBS ©2014 CBS Broadcasting, Inc. All Rights Reserved