Donald P. Bellisario Creator, Executive Producer Don McGill Creator Mark Harmon NCIS Special Agent Leroy Jethro Gibbs Actor, Executive Producer 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 David McCallum Dr. Donald "Ducky" Mallard Guest Star Kevin Chapman Billy Doyle Guest Star Ashley Platz Kat Hanna Guest Star Jose Pablo Cantillo DEA Agent Mark Sisco A.K.A Shady Man Guest Star Trisha LaFache Lola Guest Star Rueben Grundy Philadelphia P.D. Detective Dubrow Guest Star Tony Becker Policeman Guest Star Harrison Leahy Al A.K.A Boy #2 Guest Star Jeff Pride Car Owner Guest Star Braxton Hale Colin Guest Star Deb Heitt Navy Chief Laura Ramirez Guest Star Ansel Carpenter Billy A.K.A. Boy #1 Guest Star Val Garrahan Navy Petty Officer Second Class Danna Calley Guest Star Chas. Floyd Johnson Executive Producer Mark Horowitz Executive Producer Frank Cardea Executive Producer George Schenck Executive Producer Steven D. Binder Executive Producer Scott Williams Executive Producer David J. North Executive Producer Marco Schnabel Writer Terrence O'Hara Director