NCIS/Enemy on the Hill
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Enemy on the Hill is the fourth episode of the ninth season of NCIS, and the one hundred and episode overall.
Starring: Mark Harmon (Special Agent Leroy Jethro Gibbs), Michael Weatherly (Special Agent Anthony DiNozzo), Cote de Pablo (Special Agent Ziva David), Pauley Perrette (Abby Sciuto), Sean Murray (Special Agent Timothy McGee), Rocky Carroll (NCIS Director Leon Vance), David McCallum (Dr. Donald "Ducky" Mallard)