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 Bess Armstrong U.S. Sen. Denise O'Hara Guest Star Hugo Armstrong NCIS Special Agent Eugene Coyle Guest Star John Livingston Will Pritchard Guest Star Aja Evans Taylor Turner Guest Star Desiree Hall Jennifer Morrison Guest Star Everette Wallin Navy Cmdr. Lionel Saxon Guest Star Suzanne Quast Liz Allen Guest Star Anthony Palermo Nicholas "Nick" Bodeen Guest Star Gary Glasberg Executive Producer Chas. Floyd Johnson Executive Producer Mark Horowitz Executive Producer Shane Brennan Executive Producer Donald P. Bellisario Executive Producer George Schenck Writer Frank Cardea Writer Thomas J. Wright Director