Mark Harmon NCIS Special Agent Leroy Jethro Gibbs Actor, Executive Producer Michael Weatherly NCIS Special Agent Anthony "Tony" Dinozzo Actor Pauley Perrette Forensic Specialist Abby Sciuto Actor Sean Murray NCIS Special Agent Timothy McGee Actor Brian Dietzen Dr. Jimmy Palmer Actor Emily Wickersham Probationary NCIS Agent Eleanor "Ellie" Bishop Actor Rocky Carroll NCIS Director Leon Vance Actor David McCallum Dr. Donald "Ducky" Mallard Actor Ethan Rains NCIS Systems Administrator Kevin Hussein Guest Star Alex Veadov International Mercenary Sergei Mishnev Guest Star Lev Gorn Russian Counselor Anton Pavlenko Guest Star Alison Haislip Navy Lt. Cmdr. Hannah Banks Guest Star Beau Wirick Navy Lt. Joseph Hagen Guest Star Regi Davis Cmdr. David Smith Guest Star Konstantin Lavish Yuri Guest Star Vaz Andreas Dimitri Guest Star Gary Glasberg Executive Producer, Writer Chas. Floyd Johnson Executive Producer Mark Horowitz Executive Producer Shane Brennan Executive Producer Donald P. Bellisario Executive Producer Scott Williams Writer Tony Wharmby Director