Jamie Lee Curtis and Mark Harmon in NCIS (2003)

Mark Harmon and Daniel Polo in NCIS (2003)

Mark Harmon, Pauley Perrette, David McCallum, and Cote de Pablo in NCIS (2003)

Mark Harmon, Sean Murray, Michael Weatherly, and Brian Dietzen in NCIS (2003)

Mark Harmon and Brian Dietzen in NCIS (2003)

Mark Harmon, Pauley Perrette, Michael Weatherly, Brian Dietzen, and Cote de Pablo in NCIS (2003)

Mark Harmon and Michael Weatherly in NCIS (2003)

Mark Harmon, David McCallum, Sean Murray, Michael Weatherly, Brian Dietzen, and Cote de Pablo in NCIS (2003)

Mark Harmon, David McCallum, Sean Murray, Michael Weatherly, and Cote de Pablo in NCIS (2003)

Mark Harmon, Sean Murray, Michael Weatherly, and Cote de Pablo in NCIS (2003)

Sean Astin, Mark Harmon, and Michael Weatherly in NCIS (2003)

Mark Harmon and Rocky Carroll in NCIS (2003)

Mark Harmon and Dennis Kort in 240-Robert (1979)

Joanna Cassidy, Mark Harmon, and John Bennett Perry in 240-Robert (1979)

Mark Harmon and Marlee Matlin in Reasonable Doubts (1991)

Mark Harmon and Emily Wickersham in NCIS (2003)

Mark Harmon, Nike Doukas, and Diona Reasonover in NCIS (2003)

Mark Harmon, Wilmer Valderrama, and Cote de Pablo in NCIS (2003)

Mark Harmon, Wilmer Valderrama, Sean Murray, and Emily Wickersham in NCIS (2003)

Mark Harmon and Diona Reasonover in NCIS (2003)

Mark Harmon and Pamela Sue Martin in The Hardy Boys/Nancy Drew Mysteries (1977)

Mark Harmon in The Hardy Boys/Nancy Drew Mysteries (1977)

Mark Harmon and Terry Kiser in The Hardy Boys/Nancy Drew Mysteries (1977)

Mark Harmon, Pauley Perrette, Sasha Alexander, David McCallum, and Michael Weatherly in NCIS (2003)

Mark Harmon, Pauley Perrette, Sasha Alexander, David McCallum, Sean Murray, and Michael Weatherly in NCIS (2003)

Mark Harmon and Pauley Perrette in NCIS (2003)

Lauren Holly, Mark Harmon, Pauley Perrette, David McCallum, Michael Weatherly, and Cote de Pablo in NCIS (2003)

Lauren Holly, Mark Harmon, David McCallum, Sean Murray, Michael Weatherly, and Cote de Pablo in NCIS (2003)

Kirstie Alley, Mark Harmon, and Courtney Thorne-Smith in Summer School (1987)

Lauren Holly, Mark Harmon, Pauley Perrette, David McCallum, Sean Murray, Michael Weatherly, and Cote de Pablo in NCIS (2003)