| Movie | 1992 | Solar Crisis | Steve Kelso | |
| Movie | 1973 | Magnum Force | Officer Phil Sweet | |
| Movie | 1991 | Drop Dead Fred | Charles | |
| Movie | 1979 | 1941 | Capt. Loomis Birkhead | |
| Movie | 1983 | To Be or Not to Be | Lt. Andre Sobinski | |
| Movie | 1979 | The Apple Dumpling Gang Rides Again | Jeff Reed | |
| Movie | 2002 | National Lampoon's Van Wilder | Vance Wilder Sr. | |
| Movie | 1978 | Animal House | Eric 'Otter' Stratton | |
| Movie | 1985 | Fletch | Alan Stanwyk | |
| Movie | 1991 | Sometimes They Come Back | Jim Norman | |
| Movie | 2005 | Don't Come Knocking | Producer 1 | |
| Movie | 1984 | Up the Creek | Bob McGraw | |
| Movie | 1984 | Impulse | Stuart | |
| Movie | 1996 | Black Sheep | Al Donnelly | |
| Movie | 2009 | Behind Enemy Lines III: Colombia | Dodd | |
| Movie | 1990 | Buried Alive | Clint Goodman | |
| Movie | 2007 | Redline | Jerry Brecken | |
| Movie | 2011 | No Strings Attached | Eli's Dad #2 | |
| Movie | 2006 | Augusta, Gone | Ben Dudman | |
| Movie | 2008 | To Love and Die | James White | |
| Movie | 2003 | The King and Queen of Moonlight Bay | Al Dodge | |
| Movie | 1996 | A Holiday for Love | Jake Peterson | |
| Movie | 1997 | Buried Alive II | Clint Goodman | |
| Movie | 1993 | Shameful Secrets | Daniel | |
| Movie | 1984 | The House of God | Roy Basch | |
| Movie | 2003 | Martha, Inc.: The Story of Martha Stewart | Andy Stewart | |
| Movie | 2002 | Mom's on Strike | Alan Harris | |
| Movie | 1999 | Sam Kinison: Why Did We Laugh? | Self | |
| Movie | 1974 | Remember When | Warren Thompson | |
| Movie | 2000 | Chump Change | Simon Sez Simone | |
| Movie | 1998 | Catch Me If You Can | Norm | |
| Movie | 1969 | How to Commit Marriage | David Poe | |
| Movie | 1996 | Midnight Heat | Tyler Grey | |
| Movie | 1993 | Harmful Intent | Dr. Rhodes | |
| Movie | 1987 | Bay Coven | Jerry Lebon | |
| Movie | 1993 | A Kiss to Die For | William Tauber | |
| Movie | 1995 | Tails You Live, Heads You're Dead | Detective McKinley | |
| Movie | 1998 | Forever Love | Alex Brooks | |
| Movie | 1992 | Quicksand: No Escape | Scott Reinhardt | |
| Movie | 1995 | Twilight Man | Jordan P. Cooper | |
| Movie | 1979 | Dreamer | Harold 'Dreamer' Nuttingham | |
| Movie | 1995 | Jonny Quest vs. the Cyber Insects | 4-DAC | |
| Movie | 1976 | The Quest: The Longest Drive | Quentin Beaudine | |
| Movie | 1994 | While Justice Sleeps | Winfield 'Win' Cooke | |
| Movie | 1978 | Almost Summer | Kevin Hawkins | |
| Movie | 1978 | Confessions of the D.A. Man | Howard Goodman | |
| Movie | 1985 | Obsessed with a Married Woman | Tony Hammond | |
| Movie | 1971 | Hitched | Clare Bridgeman | |
| Movie | 1989 | Little White Lies | Dr. Harry MacRae | |
| Movie | 1996 | An Unfinished Affair | Alex Connor | |
| Movie | 1987 | Warm Hearts, Cold Feet | Mike Byrd | |
| Movie | 1998 | A Very Unlucky Leprechaun | Howard Wilson | |
| Movie | 1984 | The Best Legs in Eighth Grade | Mark Fisher | |
| Movie | 1997 | Sleeping with the Devil | Dick Strang | |
| Movie | 1996 | Buried Secrets | Clay Roff | |
| Movie | 1996 | A Very Brady Sequel | Roy Martin / Trevor Thomas | |
| Movie | 1976 | The Captive: The Longest Drive 2 | Quentin Beaudine | |
| Movie | 1975 | The Last Day | Emmet Dalton | |
| Movie | 2023 | Virgin River: The More The Merrier | Doc Mullins | |
| Movie | 2023 | Virgin River: Father Christmas | Doc Mullins | |
| Movie | 2000 | Navigating the Heart | John Daly | |
| Movie | 1991 | The Woman Who Sinned | Michael Robeson | |
| Movie | 1993 | Dying to Love You | Roger Paulson | |
| Movie | 1995 | Fast Company | Det. Jack Matthews | |
| Movie | 1993 | Mood Indigo | Dr. Peter Hellman | |
| Movie | 1975 | The Runaway Barge | Danny Worth | |
| Movie | 1968 | Yours, Mine and Ours | Mike Beardsley | |
| Movie | 1989 | Nikki and Alexander | Alexanda | |
| Movie | 2000 | Jackie Bouvier Kennedy Onassis | John F. Kennedy | |
| Movie | 2015 | Last Chance for Christmas | Reginald Buckley | |
| Movie | 1976 | The Quest | Quentin Beaudine | |
| Movie | 1982 | A Little Sex | Michael Donovan | |
| Movie | 2015 | Drunk Stoned Brilliant Dead | Self - Actor / Director / Producer | |
| Movie | 2001 | Second Honeymoon | George Weston | |
| Movie | 2016 | Killing Reagan | Ronald Reagan | |
| Movie | 1976 | The War Widow | Amy's Husband (voice) | |
| Movie | 2004 | Judas | Pontius Pilate | |
| Movie | 2017 | Jumanji: Welcome to the Jungle | Old Man Vreeke (uncredited) | |
| Movie | 1999 | She's All That | Harlan Siler | |
| Movie | 2017 | Magical Christmas Ornaments | JP Presley | |
| Movie | 2015 | Tom and Jerry: Spy Quest | The President (voice) | |
| Movie | 1989 | The Littlest Victims | Doctor James Oleske | |
| Movie | 2018 | 6 Balloons | Gary | |
| Movie | 1983 | Listen to Your Heart | Josh Stern | |
| Movie | 2000 | Sharing the Secret | John Moss | |
| Movie | 2018 | The Etruscan Smile | Weiss | |
| Movie | 1989 | Speed Zone | Jack | |
| Movie | 1977 | Mary White | William L. White | |
| Movie | 1986 | Blind Justice | Jim Anderson | |
| Movie | 2000 | Hell Swarm | Kirk Bluhdorn | |
| Movie | 1990 | Joshua's Heart | Tom | |
| Movie | 2019 | Child's Play | Henry Kaslan | |
| Movie | 1998 | Rescuers: Stories of Courage - Two Families | Adolf Althoff | |
| Movie | 1971 | Lock, Stock and Barrel | Clarence Bridgeman | |
| Movie | 1994 | Target of Suspicion | Nick | |
| Movie | 1998 | The Yearbook: An Animal House Reunion | Self - Otter | |
| Movie | 1999 | At the Mercy of a Stranger | John Davis | |
| Movie | 1982 | Bus Stop | Bo Decker | |
| Movie | 2008 | Animal House: The Inside Story | Self | |
| Movie | 1967 | The Hardy Boys: The Mystery of the Chinese Junk | Joe Hardy | |
| Movie | 2009 | American Pie Presents: The Book of Love | Alumnus Guy #4 | |
| Movie | 1967 | Divorce American Style | Mark Harmon | |
| Movie | 1976 | The Hemingway Play | Wemedge | |
| Movie | 1993 | Trial & Error | Peter Hudson | |
| Movie | 1969 | Trial Run | Delivery Person | |
| Movie | 1993 | Trial and Error | Peter Hudson | |
| Movie | 2011 | Talker | Ronald Reagan | |
| TV Show | 1964 | Jonny Quest | Jonny Quest (voice) | 26 |
| TV Show | 2006 | Shark | | 1 |
| TV Show | 1968 | Here's Lucy | Peter | 1 |
| TV Show | 1974 | Rhoda | Michael Stearns | 1 |
| TV Show | 1972 | Kung Fu | Lt. Bill Wyland | 1 |
| TV Show | 1960 | My Three Sons | | 3 |
| TV Show | 1961 | The Alvin Show | | 26 |
| TV Show | 2000 | Ed | Peter Evashavik | 1 |
| TV Show | 1995 | Cybill | | 1 |
| TV Show | 1966 | Space Ghost and Dino Boy | Jace (voice) | 60 |
| TV Show | 1969 | Room 222 | | 1 |
| TV Show | 1969 | Medical Center | | 1 |
| TV Show | 1998 | The King of Queens | Dr. Faber | 1 |
| TV Show | 1970 | Night Gallery | Henley (segment "Logoda's Heads") | 1 |
| TV Show | 1997 | The New Batman Adventures | Michael Vreeland (voice) | 1 |
| TV Show | 1968 | Adam-12 | Leroy | 1 |
| TV Show | 1982 | Tucker's Witch | Rick Tucker | 12 |
| TV Show | 1993 | Fallen Angels | Howard Hughes | 1 |
| TV Show | 1967 | Ironside | | 1 |
| TV Show | 2008 | To Love and Die | | 1 |
| TV Show | 1957 | Leave It to Beaver | | 2 |
| TV Show | 1961 | Window on Main Street | | 16 |
| TV Show | 1976 | The Quest | Quentin Beaudine | 16 |
| TV Show | 1976 | Battle of the Network Stars | | 1 |
| TV Show | 1973 | Police Story | | 1 |
| TV Show | 1967 | Young Samson & Goliath | Samson (voice) | 20 |
| TV Show | 2001 | Wolf Lake | Sheriff Matthew Donner | 9 |
| TV Show | 1967 | Shazzan | | 1 |
| TV Show | 2002 | Breaking News | Bill Dunne | 13 |
| TV Show | 1982 | Nature | Narrator (voice) | 2 |
| TV Show | 1966 | Summer Fun | | 1 |
| TV Show | 1999 | The Late Late Show with Craig Kilborn | Self | 1 |
| TV Show | 1988 | Just in Time | | 6 |
| TV Show | 1975 | Three for the Road | | 1 |
| TV Show | 1977 | What Really Happened to the Class of '65? | | 1 |
| TV Show | 1991 | Charlie Hoover | | 7 |
| TV Show | 2011 | Hart of Dixie | Dr. Brick Breeland | 76 |
| TV Show | 2004 | Justice League Unlimited | Maxwell Lord (voice) | 1 |
| TV Show | 2000 | CSI: Crime Scene Investigation | Oliver Tate | 2 |
| TV Show | 1963 | The Farmer's Daughter | Jimmy | 1 |
| TV Show | 1961 | Ripcord | David | 1 |
| TV Show | 2009 | White Collar | Edward Walker | 1 |
| TV Show | 1992 | Batman: The Animated Series | Gil Mason (voice) | 2 |
| TV Show | 1973 | The Magician | Jerry Purcell | 1 |
| TV Show | 2007 | Burn Notice | Larry Sizemore | 5 |
| TV Show | 2019 | Evil | Edward Tragoren | 4 |
| TV Show | 1968 | Hawaii Five-O | Brent Saunders | 1 |
| TV Show | 1997 | The Legend of Calamity Jane | John O'Rourke (voice) | 5 |
| TV Show | 2022 | Quantum Leap | Neal Russell | 1 |
| TV Show | 1999 | The West Wing | John Hoynes | 19 |
| TV Show | 2017 | The Good Fight | Tully Nelson | 4 |
| TV Show | 1959 | Bonanza | Griff King | 16 |
| TV Show | 1974 | Petrocelli | Mike Fisher | 1 |
| TV Show | 2019 | Virgin River | Vernon 'Doc' Mullins | 42 |
| TV Show | 1971 | Owen Marshall: Counselor at Law | Gerry Collier | 1 |
| TV Show | 2019 | Fast & Furious Spy Racers | General Dudley (voice) | 3 |
| TV Show | 2019 | Fast & Furious Spy Racers | General Dudley | 1 |
| TV Show | 2016 | This Is Us | Dave Malone | 4 |
| TV Show | 2013 | The Goldbergs | Eric | 1 |
| TV Show | 1971 | Owen Marshall: Counselor at Law | John Peterson | 1 |
| TV Show | 2002 | Without a Trace | Aaron Morrison | 1 |
| TV Show | 1977 | How the West Was Won | Curt Grayson | 2 |
| TV Show | 2010 | Scooby-Doo! Mystery Incorporated | Brad Chiles (voice) | 13 |
| TV Show | 2008 | Batman: The Brave and the Bold | Jarvis Kord (voice) | 1 |
| TV Show | 1971 | Owen Marshall: Counselor at Law | Zooie Palmer | 1 |
| TV Show | 1962 | The Virginian | Jim Horn | 24 |
| TV Show | 1966 | Space Ghost & Dino Boy | Jace (Voice) | 20 |
| TV Show | 2014 | Madam Secretary | Fred Moran | 1 |
