Next week on NCIS: Los Angeles, the team seeks "The Fifth Man" after it investigates a compromised Intel operation in which four people connected to the classified project are killed at a diner explosion.

As partners Deeks and Kensi are hot on the trail of those involved, they discover that a wayward teenage girl might be related and Agent Blye can’t help but be empathetic to her challenging situation.

In a fun twist, four cast members' real-life moms - Daniela Ruah's, Chris O'Donnell's, LL Cool J's and Eric Christian Olsen's - guest star as women at a casino table during the team's investigation.

Read our NCIS: LA review from last night and watch next week's promo below ...

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.