Mark Harmon NCIS Special Agent Leroy Jethro Gibbs Actor Michael Weatherly NCIS Special Agent Anthony "Tony" Dinozzo Actor Cote de Pablo NCIS Special Agent Ziva David Actor Pauley Perrette Forensic Specialist Abby Sciuto Actor Sean Murray NCIS Special Agent Timothy McGee Actor Rocky Carroll NCIS Director Leon Vance Actor David McCallum Dr. Donald "Ducky" Mallard Actor Brian Dietzen Jimmy Palmer Guest Star Meredith Monroe April Ferris Guest Star Brennan Elliott Martin Stillwell Guest Star Robin Pearson Rose Clea's Mother Guest Star Raphael Sbarge Rupert Kritzer Guest Star Steven Anderson Professor Guest Star Erica Piccininni Navy Lt. Clea Thorson Guest Star Donald P. Bellisario Executive Producer Tony Wharmby Director Nicole Mirante-Matthews Writer