Source: MSN TV [follow link for complete column]
MSN TV: Tonight's Picks Tuesday, October 4, 2011
... NCIS: Los Angeles
9:00 PM, CBS
The death of a Marine in a car explosion has Sam (LL Cool J) working under cover as a bomb specialist as the team tries to track down any additional explosives that might be out there. Hunter (Claire Forlani) shakes things up by partnering Callen (Chris O'Donnell) with Kensi (Daniela Ruah) and Sam with Deeks (Eric Christian Olsen) in the new episode "Backstopped."