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Sight Unseen is the twentieth episode of the fifteenth season of NCIS, and the three hundred fiftieth episode overall.
Starring: Mark Harmon (Leroy Jethro Gibbs), Pauley Perrette (Abby Sciuto), Sean Murray (Timothy McGee), Wilmer Valderrama (Special Agent Nicholas "Nick" Torres), Maria Bello (NCIS Special Agent Jacqueline "Jack" Sloane), Emily Wickersham (Eleanor Bishop), Brian Dietzen (Dr. Jimmy Palmer), Duane Henry (MI6 Officer Clayton Reeves)
Guest Starring: Marilee Talkington (Annie Barth), Robert Mammana (Sheriff Pearson), James Eckhouse (Fred Cabrisio), Sara Fletcher (Louise Cabrisio), Greg Cromer (Webber Silk), Delon de Metz (Petty Officer Thomas Billings), Matthew Jones (Navy Commander Rick Odwalla), Giovanni Lopes (Nordstrom)
Co-Starring: Lane Compton (Trevor Barth)