Pictured: Chris O'Donnell (Special Agent G. Callen) and LL COOL J (Special Agent Sam Hanna). The team searches for a former Marine and expert sniper who escaped a Veterans hospital when they discover his connection to the leader of an extremist group. Also, the case reminds Kensi of her past as a sniper, on NCIS: LOS ANGELES, Monday, May 4 (10:00-11:00 PM, ET/PT) on the CBS Television Network. Photo: Neil Jacobs/CBS ©2015 CBS Broadcasting, Inc. All Rights Reserved.