Don McGill Creator Donald P. Bellisario Creator Sean Murray NCIS Special Agent Timothy McGee Actor Wilmer Valderrama NCIS Special Agent Nicholas "Nick" Torres Actor Brian Dietzen Dr. Jimmy Palmer Actor Diona Reasonover Forensic Scientist Kasie Hines Actor Katrina Law NCIS Special Agent Jessica Knight Actor Rocky Carroll NCIS Director Leon Vance Actor David McCallum Dr. Donald "Ducky" Mallard Actor Gary Cole FBI Special Agent Alden Parker Actor Mark Atteberry Medgar Nash Guest Star Amber Friendly Eden Greyson Guest Star Menik Gooneratne Diya Khatri Guest Star Damian Joseph Quinn Travis Baltoni Guest Star KayKay Blaisdell Gen Z Girl Guest Star Vonzell Carter Instructor Guest Star Mark Harmon Actor, Executive Producer 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 Kimberly-Rose Wolter Writer José Clemente Hernandez Director