Donald P. Bellisario Creator, Executive Producer Don McGill 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 Laura San Giacomo Dr. Grace Confalone Guest Star Laith Wallschleger Erik Nilsson, Dozer Guest Star Jonathan Kowalsky Nate Holt, Rookie Guest Star Billy Miller Ezra Moretti, Second Man Guest Star Beth Fraser Reporter #1 Guest Star Danny Royce Reporter #2 Guest Star Jane Carr Dr. Erica Heller Guest Star Michael McShane Dr. Matthew Heller Guest Star Grace Narducci Nicole Guest Star Deborah Vancelette Nurse Guest Star Marty Dew Daniel Vega Guest Star Chas. Floyd Johnson Executive Producer Mark Horowitz Executive Producer Mark Harmon Executive Producer Frank Cardea Executive Producer George Schenck Executive Producer Steven D. Binder Executive Producer Scott Williams Executive Producer David J. North Executive Producer Christopher J. Waild Executive Producer Yasemin Yilmaz Writer Diana Valentine Director