Sean Murray NCIS Special Agent Timothy McGee Actor Wilmer Valderrama NCIS Special Agent Nicholas "Nick" Torres Actor Brian Dietzen Dr. Jimmy Palmer Actor Diona Reasonover Forensic Scientist Kasie Hines Actor Katrina Law NCIS Special Agent Jessica Knight Actor Rocky Carroll NCIS Director Leon Vance Actor Gary Cole FBI Special Agent Alden Parker Actor Roma Maffia Vera Strickland Guest Star Marco Schnabel Screenplay Actor, Writer Michael Lowry Thomas Mulligan Actor Bobby Moynihan Woodrow Browne Actor Steven D. Binder Executive Producer David J. North Executive Producer Chas. Floyd Johnson Executive Producer Mark Harmon Executive Producer Scott Williams Executive Producer Christopher J. Waild Executive Producer Mark R. Schilz Executive Producer José Clemente Hernandez Director Brian Kirk Original Music