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 Robert Wagner Anthony Dinozzo Sr. Guest Star Sarah Clarke FBI Special Agent Tess Monroe Guest Star Duane Henry Clayton Reeves Guest Star Laura San Giacomo Dr. Grace Confalone Guest Star Juliette Angelo Emily Fornell Guest Star David Dayan Fisher Trent Kort Guest Star Vince Nappo Jacob Scott Guest Star Mia Barron Katrina Griffin Guest Star William Duffy Harris Cobb Guest Star Yorgos Karamihos Interpol Officer Kohl Guest Star Salome Azizi Correspondant Guest Star Joe Spano Senior FBI Agent T.C. Fornell Guest Star Gary Glasberg Executive Producer, Writer 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, Writer Donald P. Bellisario Executive Producer Tony Wharmby Director