S6, E20: Callen and Sam resume their undercover identities as a prisoner and guard to infiltrate a white supremacist group believed to be in possession of stolen nuclear material.
Alicia Coppola
Patrick Kilpatrick
Rodney Eastman
Rebecca Field
Charles Halford
Sean Harmon
Linc Hand
Kevin Fry-Bowers
Patti Tippo
Burt Grinstead
C.J. Valleroy