NCIS: Los Angeles (2009)

S06E20 Rage

Title: Fury Plot: Callen and Sam take on new undercover roles, with Callen posing as an inmate and Sam as a corrections officer, to penetrate a white supremacist organization suspected of holding stolen nuclear weapons. Meanwhile, Kensi adopts a tough biker persona, complete with tattoos, to convincingly portray Callen's girlfriend. In addition, the episode unveils the backstory of Callen's initial encounter with Hetty.