Mark Harmon NCIS Special Agent Leroy Jethro Gibbs Actor, Executive Producer Pauley Perrette Forensic Specialist Abby Sciuto Actor Sean Murray NCIS Special Agent Timothy McGee Actor Wilmer Valderrama NCIS Special Agent Nicholas "Nick" Torres Actor Jennifer Esposito NCIS Special Agent Alexandra "Alex" Quinn Actor Emily Wickersham NCIS Probationary Agent Eleanor "Ellie" Bishop Actor Brian Dietzen Dr. Jimmy Palmer Actor Duane Henry MI6 Officer Clayton Reeves Actor Rocky Carroll NCIS Director Leon Vance Actor David McCallum Dr. Donald "Ducky" Mallard Actor Rafi Silver Qasim Naasir Guest Star Claudia Christian Agent Louise Moreau Guest Star Travis Schuldt Paul Miller Guest Star Lanny Joon Edward Jin Tao Guest Star Elise Robertson Alice Miller Guest Star Rick Hall Larry Ambrose Guest Star Neil Sandilands Hendric Kruger Guest Star Shaan Sharma Kasim Alfrah Guest Star Pat Harvey Reporter Guest Star Monica Lawson Nurse 1 Guest Star Jill Czarnowski NCIS Technician Ottsley Guest Star Ravi Naidu Doctor Guest Star Allyssa Amelia Entz Lexie Miller Guest Star Bruce Locke Kai Chen 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 Donald P. Bellisario Executive Producer Gina Lucita Monreal Writer Tony Wharmby Director