VIDEO: Sneak Peek - Season Premiere of CBS's NCIS: LOS ANGELES

On the fifth season premiere of CBS's NCIS: LOS ANGELES titled 'Ascension,' while Sam and Deeks recover from traumatic torture that will have a lasting impact on their personal and professional relationships, lives are still in jeopardy as the NCIS: LA team searches for stolen nuclear weapons.

The episode airs Tuesday, Sept. 24 (9:00-10:00 PM, ET/PT) on the CBS Television Network. Guest stars include Aunjanue Ellis as Michelle Hanna, Christopher Lambert as Marcel Janvier and Timothy V. Murphy as Isaak Sidorov. Get a sneak peek below!

NCIS: LOS ANGELES is a drama about the high-stakes world of a division of NCIS that is charged with apprehending dangerous and elusive criminals that pose a threat to the nation's security.  By assuming false identities and utilizing the most advanced technology, this team of highly trained agents goes deep undercover, putting their lives on the line in the field to bring down their targets.  Special Agent "G" Callen is a chameleon who transforms himself into whomever he needs to be to infiltrate the criminal underworld.