Mark Harmon
- Freakier Friday
2025 Ryan
- NCIS: Origins
2024 Executive Producer
- All or Nothing: The Michigan Wolverines
2018 Narrator (voice)
- NCIS: New Orleans
2014 Executive Producer
- Certain Prey
2011 Executive Producer
- Justice League: Crisis on Two Earths
2010 Superman (voice)
- Weather Girl
2009 Dale
- Chasing Liberty
2004 James Foster
- Freaky Friday
2003 Ryan
- NCIS
2003 Executive Producer
- Local Boys
2002 Jim Wesley
- Crossfire Trail
2001 Bruce Barkow
- And Never Let Her Go
2001 Thomas Capano
- The Amati Girls
2001 Lawrence
- The Legend of Tarzan
2001 Bob Markham (voice)
- And Never Let Her Go
2001 Thomas Capano
- For All Time
2000 Charles Lattimer
- Boston Public
2000 Director
- I'll Remember April
1999 John Cooper
- The West Wing
1999 Simon Donovan
- Family Guy
1999 Leroy Jethro Gibbs (voice)
- Fear and Loathing in Las Vegas
1998 Magazine Reporter
- From the Earth to the Moon
1998 Wally Schirra
- Casualties
1997 Tommy Nance
- The First to Go
1997 Jeremy Hampton
- Strangers
1996 Mark
- Original Sins
1995 Johnathan Franye
- Magic in the Water
1995 Jack Black
- The Last Supper
1995 Dominant Male
- JAG
1995 Leroy Jethro Gibbs
- Charlie Grace
1995 Producer
- Wyatt Earp
1994 Sheriff Johnny Behan
- Natural Born Killers
1994 Mickey Knox in TV
- Chicago Hope
1994 Director
- Cold Heaven
1992 Alex Davenport
- Shadow of a Doubt
1991 Charles Spencer
- Dillinger
1991 John Dillinger
- Long Road Home
1991 Ertie Robertson
- Till There Was You
1991 Frank Flynn
- Fourth Story
1991 David Shepard
- Reasonable Doubts
1991 Det. Dicky Cobb
- Worth Winning
1989 Taylor Worth
- Sweet Bird of Youth
1989 Chance Wayne
- The Presidio
1988 Jay Austin
- Stealing Home
1988 Billy Wyatt
- Summer School
1987 Freddy Shoop
- Dear America: Letters Home from Vietnam
1987 (voice)
- After the Promise
1987 Elmer Jackson
- The Deliberate Stranger
1986 Ted Bundy
- Prince of Bel Air
1986 Robin Prince
- Let's Get Harry
1986 Harry
- The Deliberate Stranger
1986 Ted Bundy
- Moonlighting
1985 Sam Crawford
- Tuareg: Desert Warrior
1984 Gacel Sayah
- Intimate Agony
1983 Tommy
- St. Elsewhere
1982 Robert Caldwell
- Flamingo Road
1981 Field Carlyle
- Goliath Awaits
1981 Peter Cabot
- Flamingo Road
1980 Fielding Carlyle
- The Dream Merchants
1980 Johnny Edge
- Beyond the Poseidon Adventure
1979 Larry Simpson
- 240-Robert
1979 Thib Thibideaux
- Getting Married
1978 Howie Lesser
- Comes a Horseman
1978 Billy Joe Meynert
- Little Mo
1978 Norman Brinker
- Centennial
1978 Captain John McIntosh
- Sam
1978 Mike Breen
- Eleanor and Franklin: The White House Years
1977 Robert Dunlap
- The Love Boat
1977 Doug Bradbury
- All's Fair
1976
- Delvecchio
1976 Ronnie Striker
- Sonic Boom
1974 Student Controller
- Police Woman
1974 Stanski
- Ozzie's Girls
1973
- Emergency!
1972 Ofcr. Dave Gordon
- Adam-12
1968 Officer Gus Corbin
- Hallmark Hall of Fame
1951 Charles
