The team gets a new lead in the mole investigation after an unknown assailant kills two men disguised as sheriff's deputies in front of Callen's home; Nell interviews a prison inmate who has information on the department's leak.
When a young woman is murdered in a suspected contract killing, Jane risks everything to protect the teenage witness.
When the Weavers and Bird-Kersees go camping, Marty tries to prove that he is manly like his dad; the families have an encounter with an animal.