Donald P. Bellisario Creator Don McGill Creator Sean Murray NCIS Special Agent Timothy McGee Actor Wilmer Valderrama NCIS Special Agent Nicholas "Nick" Torres Actor Brian Dietzen Dr. Jimmy Palmer Actor, Writer 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 Daniela Ruah Special Agent Kensi Blye Guest Star, Director Russell Wong Feng Zhao Guest Star Vanessa Lachey Special Agent in Charge Jane Tennant Guest Star Christopher J. Waild Writer, Executive Producer Marco Schnabel Writer Diana Valentine Director Scott Williams Writer, Executive Producer Steven D. Binder Executive Producer Michael Zinberg Director Lionel Coleman Director David J. North Executive Producer Chas. Floyd Johnson Executive Producer Mark Harmon Executive Producer Sydney Mitchel Writer Mark R. Schilz Executive Producer José Clemente Hernandez Director Brendan Fehily Writer