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 Matt Craven Secretary of the Navy Clayton Jarvis Guest Star John Finn Marine Commandant Charles T. Ellison Guest Star Jaime Ray Newman Lt. Cmdr. Melanie Burke Guest Star Darby Stanchfield Shannon Gibbs Guest Star Alex Fernandez Joseph Flores Guest Star LaMonica Garrett Marine Capt. Craig Quincy Guest Star Sean Harmon Young Leroy Jethro Gibbs Guest Star Jeananne Goossen Marine Pvt. Joan Matteson Guest Star Dylan Bruce Justin Fanniker Guest Star Samantha Sloyan Emily Goodwin Guest Star Sofia Pernas Marine 1st Lt. Gabriela Flores Guest Star Wade Harlan Marine Cadence Leader Guest Star Donald P. Bellisario Executive Producer Gina Lucita Monreal Writer James Whitmore Jr. Director