As Callen (Chris O'Donnell) continues his pursuit of Katya, Kilbride (Gerald McRaney) comes to NCIS seeking help with finding a truckload of stolen guns. That assignment gets a lot more complicated, though, when their prime suspect, the son of a mob boss they believe was about to sell the weapons, is found dead in the new episode "Sorry for Your Loss." Isabella Hofmann, Yssa Mei Panganiban, Tyler Poelle and Chad Addison guest star; LL Cool J, Linda Hunt and Daniela Ruah also star.