| 2020 | The Rockefellers: Part 1 | Narrator |
| 2018 | Summer of Love | Narrator |
| 2017 | The Joneses Unplugged | Ralph Wilson |
| 2017 | Neil Stryker and The Tyrant of Time | The Admiral |
| 2016 | Ride the Tiger: A Guide Through the Bipolar Brain | Narator |
| 2011 | Hoodwinked Too! Hood VS. Evil | Nicky Flippers (voice) |
| 2011 | The Lord is Not On Trial Here Today | Narrator |
| 2010 | Regular Show | Mr. Maellard (voice) |
| 2010 | Rizzoli & Isles | Dr. Arthur Isles |
| 2009 | Not Dead Yet | William Weinshawler |
| 2008 | Leverage | Walt Whitman Wellesley IV |
| 2008 | Together Again for the First Time | Max Frobisher |
| 2008 | George H.W. Bush | Narrator (voice) |
| 2007 | Andrew Jackson: Good, Evil & The Presidency | Henry Clay (voice) |
| 2006 | Lady in the Water | Narrator (uncredited) |
| 2006 | Leroy & Stitch | Jumba (voice) |
| 2006 | Winnie the Pooh: Wonderful Word Adventure | Narrator |
| 2005 | Hoodwinked! | Nicky Flippers (voice) |
| 2005 | Lilo & Stitch 2: Stitch Has a Glitch | Dr. Jumba Jookiba (voice) |
| 2005 | Pooh's Heffalump Halloween Movie | Narrator |
| 2005 | The Story Room: The Making of 'Lilo & Stitch' | Himself |
| 2005 | The Origin of Stitch | Dr. Jumba Jookiba (voice) |
| 2005 | Disney Princess Sing Along Songs, Vol. 2 - Enchanted Tea Party | Cogsworth (voice) |
| 2005 | Fidel Castro | Narrator |
| 2005 | Victory in the Pacific | Narrator |
| 2004 | Stargate Atlantis | Oberoth |
| 2004 | Justice League Unlimited | Solovar (voice) |
| 2004 | Winnie the Pooh: Springtime with Roo | Narrator (voice) |
| 2004 | Teacher's Pet | Mr. Jolly (voice) |
| 2004 | The Cat That Looked at a King | The King / The Prime Minister (voice) |
| 2004 | Golden Gate Bridge | Narrator |
| 2003 | Stitch! The Movie | Dr. Jumba Jookiba (voice) |
| 2003 | Lilo & Stitch: The Series | Dr. Jumba Jookiba (voice) |
| 2003 | Batman: Mystery of the Batwoman | Penguin (voice) |
| 2003 | New York: The Center of the World | narrator |
| 2003 | Chicago: City of the Century: Part 2 - The Revolution Has Begun | Narriator |
| 2003 | Chicago: City of the Century - Part 1: Mudhole to Metropolis | Narrator |
| 2003 | Chicago: City of the Century - Part 3: Battle for Chicago | Narrator |
| 2003 | Chicago: City of the Century | Self - Narrator (voice) |
| 2002 | Lilo & Stitch | Jumba (voice) |
| 2002 | The Dead Zone | Gene Purdy |
| 2002 | The Dead Zone | Reverend Eugene 'Gene' Purdy |
| 2002 | M*A*S*H: 30th Anniversary Reunion | Himself |
| 2002 | Ansel Adams | Narrator (voice) |
| 2001 | Atlantis: The Lost Empire | Fenton Q. Harcourt (voice) |
| 2001 | The Curse of the Jade Scorpion | Voltan |
| 2001 | The Majestic | Doc Stanton |
| 2001 | Justice League | Solovar (voice) |
| 2001 | Justice League | Solovar / Car Owner (voice) |
| 2001 | Mickey's Magical Christmas: Snowed in at the House of Mouse | Cogsworth |
| 2001 | Tomcats | Dr. Crawford |
| 2001 | Disney's House of Mouse | Cogsworth |
| 2001 | Disney's House of Mouse | Cogsworth (voice) |
| 2001 | Murder, She Wrote: The Last Free Man | Stanford Thornton |
| 2000 | Static Shock | Dr. Odium (voice) |
| 2000 | Teacher's Pet | |
| 2000 | The Fantasia Legacy: The Concert Feature | Narrator (voice) |
| 2000 | The Rockefellers: Part 2 | Narrator |
| 1999 | Belle's Tales of Friendship | Cogsworth (voice) |
| 1999 | Love & Money | Nicholas Conklin |
| 1999 | New York: A Documentary Film | Narrator |
| 1999 | MacArthur | Narrator |
| 1998 | Pocahontas II: Journey to a New World | Ratcliffe (voice) |
| 1998 | Belle's Magical World | Cogsworth (voice) |
| 1998 | The Wild Thornberrys | Karroo (voice) |
| 1998 | Two Guys and a Girl | Mr. Bauer |
| 1998 | Krippendorf's Tribe | Henry Spivey |
| 1998 | Reagan | Self / Narrator |
| 1998 | American Experience: Reagan: Part II | Himself / Narrator |
| 1997 | Beauty and the Beast: The Enchanted Christmas | Cogsworth (voice) |
| 1997 | Jungle 2 Jungle | Alexei Jovanovic |
| 1997 | Ally McBeal | Judge Andrew Peters |
| 1997 | The Angry Beavers | |
| 1997 | The Practice | |
| 1997 | Meet Wally Sparks | Floyd Preston |
| 1997 | Justice League of America | J'onn J'onzz / Martian Manhunter |
| 1997 | The Wonderful World of Disney | |
| 1996 | The Hunchback of Notre Dame | Archdeacon (voice) |
| 1996 | Everyone Says I Love You | Holden's Parent |
| 1996 | Poltergeist: The Legacy | Randolph Hitchcock |
| 1996 | To Face Her Past | Ken Bradfield |
| 1995 | Pocahontas | Governor Ratcliffe (voice) |
| 1995 | Mighty Aphrodite | Laius |
| 1995 | The Outer Limits | Reverend Dr. Thomas Tilford |
| 1995 | Napoleon | Koala / Owl (voice) |
| 1995 | Bad Company | Judge Justin Beach |
| 1995 | Cybill | |
| 1995 | Steal Big Steal Little | Judge Winton Myers |
| 1994 | Iron Will | J.W. Harper |
| 1994 | Touched by an Angel | Jones / Satan |
| 1994 | Past Tense | Dr. Bert James |
| 1993 | Frasier | Leland Barton |
| 1993 | Dr. Quinn, Medicine Woman | |
| 1993 | Without a Kiss Goodbye | Gerald Orr |
| 1993 | Taking Liberty | Benjamin Franklin |
| 1992 | The Last of His Tribe | Dr. Saxton Pope |
| 1992 | Earth and the American Dream | Reader (voice) |
| 1992 | Jack's Place | |
| 1992 | Mastergate | Shepherd Hunter |
| 1991 | Beauty and the Beast | Cogsworth (voice) |
| 1991 | Doc Hollywood | Mayor Nick Nicholson |
| 1991 | Shadows and Fog | Hacker |
| 1991 | Wife, Mother, Murderer: The Marie Hilley Story | John Homan |
| 1991 | Memories of M*A*S*H | Self / Charles Winchester |
| 1990 | Wings | Edward Tinsdale |
| 1990 | The Kissing Place | Charles Tulane |
| 1990 | How to Murder a Millionaire | Gilbert |
| 1989 | Day One | Franklin D. Roosevelt |
| 1989 | The Final Days | General Alexander M. Haig Jr |
| 1988 | Another Woman | Young Marion's Father |
| 1988 | The Accidental Tourist | Porter Leary |
| 1988 | American Experience | Narrator (voice) |
| 1988 | Perry Mason: The Case of the Lady in the Lake | D.A. Michael Reston |
| 1988 | Perry Mason: The Case of the Avenging Ace | D.A. Michael Reston |
| 1987 | Star Trek: The Next Generation | Timicin |
| 1987 | The Alamo: Thirteen Days to Glory | Colonel Black |
| 1987 | Perry Mason: The Case of the Lost Love | D.A. Michael Reston |
| 1987 | Perry Mason: The Case of the Sinister Spirit | D.A. Michael Reston |
| 1987 | Perry Mason: The Case of the Murdered Madam | D.A. Michael Reston |
| 1987 | Perry Mason: The Case of the Scandalous Scoundrel | Michael Reston |
| 1987 | J. Edgar Hoover | Franklin D. Roosevelt |
| 1986 | ALF | Flakey Pete |
| 1986 | Matlock | |
| 1986 | Matlock | Thomas Baldwin |
| 1986 | Perry Mason: The Case of the Notorious Nun | D.A. Michael Reston |
| 1986 | Perry Mason: The Case of the Shooting Star | Michael Reston |
| 1986 | Mrs. Delafield Wants to Marry | Horton Delafield |
| 1985 | Better Off Dead... | Al Meyer |
| 1985 | The Man with One Red Shoe | The Conductor |
| 1985 | North and South | Rep. Sam Greene |
| 1985 | Creator | Dr. Sid Kullenbeck |
| 1985 | The Ray Bradbury Theater | Leonard Mead |
| 1985 | The Bad Seed | Emory Breedlove |
| 1984 | Murder, She Wrote | Aubrey Thornton |
| 1984 | Murder, She Wrote | Howard Deems |
| 1984 | Murder, She Wrote | Sergei Nemiroff |
| 1984 | The First Olympics: Athens 1896 | Dr. William Milligan Sloane |
| 1984 | Anatomy of an Illness | Cleveland Amory |
| 1983 | The Innocents Abroad | Doktor Jackson |
| 1982 | The Day the Bubble Burst | William Crapo Durant |
| 1981 | Harry's War | Ernie |
| 1980 | Damien: The Leper Priest | Dr. Arthur Mouritz |
| 1980 | The Oldest Living Graduate | Major |
| 1979 | Breaking Up Is Hard to Do | Howard Freed |
| 1979 | Sweepstakes | |
| 1978 | Magic | George Todson |
| 1978 | The Cheap Detective | Captain |
| 1978 | Sergeant Matlovich vs. the U.S. Air Force | G-2 Captain |
| 1978 | A Love Affair: The Eleanor and Lou Gehrig Story | Dr. Charles Mayo |
| 1977 | Oh, God! | Mr. McCarthy, District Produce Manager |
| 1977 | A Circle of Children | Dan Franklin |
| 1976 | Charlie's Angels | Scott Woodville |
| 1976 | Charlie's Angels | Scott Woodville |
| 1976 | The Tony Randall Show | Robert W. Cleaver |
| 1974 | NOVA | Narrator |
| 1974 | Rhoda | |
| 1974 | Rhoda | George |
| 1974 | Dinah! | Self |
| 1973 | Kojak | Bryan LeBlanc |
| 1972 | M*A*S*H | Charles Winchester |
| 1971 | THX 1138 | Announcer (voice) |
| 1971 | Drive, He Said | Pro Owner |
| 1971 | Great Performances | Doc |
| 1956 | Tony Awards | Self (archive footage) |
