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 David McCallum Dr. Donald "Ducky" Mallard Actor Gary Cole FBI Special Agent Alden Parker Actor Kash Abdulmalik Carter Landegraff, Traffic volunteer Guest Star Peter Porte Owen Belfort III, Preppy dad Guest Star Brian Smith Larry, Dad, Bro, Driver Guest Star Erik Heger Sam the manager, Hans Bjurstorm Guest Star Rob Welsh Julian Reinhardt, Angry mourner Guest Star Mary Chieffo Sierra Thompson Guest Star Kyle Eastman Stafford Meeks Guest Star Desiree Mee Jung Dee Walters Guest Star Chas. Floyd Johnson Executive Producer Mark Horowitz Executive Producer Mark Harmon Executive Producer Frank Cardea Executive Producer George Schenck Executive Producer Steven D. Binder Executive Producer Scott Williams Executive Producer, Writer Donald P. Bellisario Executive Producer Tawnia McKiernan Director