Mark Harmon NCIS Special Agent Leroy Jethro Gibbs Actor, Executive Producer Sean Murray NCIS Special Agent Timothy McGee Actor Emily Wickersham NCIS Special Agent Eleanor "Ellie" Bishop Actor Wilmer Valderrama NCIS Special Agent Nicholas "Nick" Torres Actor Maria Bello Special Agent Jacqueline "Jack" Sloane Actor Brian Dietzen Dr. Jimmy Palmer Actor Diona Reasonover Forensic Scientist Kasie Hines Actor Rocky Carroll NCIS Director Leon Vance Actor, Director David McCallum Dr. Donald "Ducky" Mallard Actor Leif Gantvoort Max Devendorf Guest Star Shahine Ezell Lenny Guest Star Scott Deckert Bobby Guest Star Bellina Logan M.P.D. Commander Roberta Stock Guest Star Connie Jackson Elaine Guest Star Scott Christopher M.P.D. Detective Edmund Kerrigan Guest Star Siri Miller Melissa Spagnolo Guest Star Selina Kaye Phyllis Guest Star Mario Ardila Jr. Shayne Garcon Guest Star Harvey J. Alperin Henry Mantell Guest Star Casey Leach Danny Spagnolo, Danny the Driver Guest Star Linsay Rousseau M.P.D. Cop #1 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, Writer Donald P. Bellisario Executive Producer