| 2024 | Life After the NeverEnding Story | Self |
| 2021 | Masters del Universo: Revelación (serie) | Moss Man (voice) |
| 2019 | Forky hace una pregunta: ¿Qué es el tiempo? | Old Timer (voice) |
| 2016 | The Curse of the Three Terrors | Skeletor |
| 2015 | Fall of Grayskull | Narrator |
| 2010 | Hora de aventuras (serie) | Darren the Ancient Sleeper/Sun (voice) |
| 2007 | The Making of God of War II | Prometheus |
| 2006 | Hasta que la muerte nos separe (serie) | Mr. Wallach |
| 2003 | Clifford's Puppy Days (serie) | — |
| 2001 | Las macabras aventuras de Billy y Mandy (serie) | Father Time |
| 2000 | Las chicas Gilmore (serie) | Mr. Blodgett |
| 1997 | Culture | — |
| 1997 | El abogado (serie) | — |
| 1995 | Caroline in the City (serie) | Mr. Booth |
| 1995 | Ned and Stacey (serie) | Spencer Haywood |
| 1995 | Star Trek: Voyager (serie) | Nezu Ambassador |
| 1994 | Los 4 Fantásticos (serie) | — |
| 1994 | Tocados por un ángel (serie) | Gary Stein |
| 1994 | Phantom 2040 (serie) | — |
| 1994 | Chicago Hope (serie) | — |
| 1994 | Trancers 5: Sudden Deth | Farr |
| 1994 | Trancers 4: Jack of Swords | Farr |
| 1993 | Diagnóstico: Asesinato (serie) | Dr. Leonard Gould |
| 1993 | Invisible - Las Crónicas de Benjamin Knight | Dr. Knox |
| 1993 | Home Free (serie) | Ben Brookstone |
| 1993 | Star Trek: Espacio profundo nueve (serie) | Captain Keogh |
| 1992 | Batman: La Serie Animada (serie) | Auctioneer (voice) |
| 1992 | Bionic Six (serie) | Prof. Amadeus Sharp (voice) |
| 1991 | Silk Stalkings (serie) | — |
| 1991 | ¿Dónde está Wally? (serie) | (voice) |
| 1991 | El principe valiente (serie) | Merlin |
| 1991 | Child of Darkness, Child of Light | George Beavier |
| 1991 | Music Machine | Growdy (voice) |
| 1990 | Aventureros del aire (serie) | Principal Ed Pomeroy (voice) |
| 1990 | The Wizard of Oz (serie) | — |
| 1990 | Shadow Strikers | Dr. Viper (voice) |
| 1989 | Blondie & Dagwood: Second Wedding Workout | Julius Dithers (voice) |
| 1989 | X-Men: Pryde of the X-Men (serie) | The Blob (voice) |
| 1989 | A través del tiempo (serie) | Earl Skinner |
| 1989 | Chip y Chop: Guardianes rescatadores (serie) | Plato / Aldrin Klordane (voice) |
| 1989 | Coach (serie) | Dr. Alshire |
| 1988 | Murphy Brown (serie) | Eugene Kinsella |
| 1988 | Superman (serie) | Jonathan Kent (voice) |
| 1988 | Slimer! and the Real Ghostbusters (serie) | Goolem (voice) |
| 1988 | BraveStarr: La leyenda | Handlebar / Outlaw Scuzz / Stampede (voice) |
| 1987 | Las Tortugas Ninja (serie) | Dr. Polidorius (voice) |
| 1987 | Star Trek: La nueva generación (serie) | Koroth |
| 1987 | Patoaventuras (serie) | — |
| 1987 | BraveStarr (serie) | Diamondback / Handlebar / Outlaw Skuzz / Stampede |
| 1987 | Blondie & Dagwood | Julius C. Dithers (voice) |
| 1987 | Matrimonio Con Hijos (serie) | Mr. Foodie |
| 1987 | Las dos señoras Grenville (serie) | Sam Rosenthal |
| 1986 | Chuck Norris: Karate Kommando (serie) | Kimo (voice) |
| 1986 | La ley de Los Ángeles (serie) | Judge Stephen Weeks |
| 1986 | Cazafantasmas Filmation (serie) | Merlin / Prime Evil / Fangster / Captain Long John Scarechrome / Airhead |
| 1986 | Strong Medicine (serie) | Dr. Noah Townsend |
| 1986 | Rambo, la fuerza de la libertad (serie) | — |
| 1986 | Matlock (serie) | Dr. Linder |
| 1986 | The Wuzzles: Bulls of a Feather | Rhinokey / Crock / Mr. Packcat (voice) |
| 1986 | Skeletor's Revenge | Skeletor / Man-At-Arms / Cringer / Battle Cat / Melaktha / Cat Spy (voice) |
| 1985 | He-Man y She-Ra: Especial de Navidad | Skeletor / Man-At-Arms / Zipper (voice) |
| 1985 | The Pound Puppies | Barkerville (voice) |
| 1985 | Wuzzles (serie) | Rhinokey / Crocosaurus (voice) |
| 1985 | She-Ra, La Princesa del Poder (serie) | Skeletor / Cringer / Announcer |
| 1985 | He-Man & She-Ra, El secreto de la espada | Skeletor / Man-at-Arms / Cringer / Battle Cat / Bald Rebel / Chef Alan (voice) |
| 1985 | Mr. Belvedere (serie) | — |
| 1984 | Challenge of the GoBots (serie) | — |
| 1984 | Transformers G1 (serie) | — |
| 1984 | ¿Quién es el jefe? (serie) | — |
| 1984 | The Smurfic Games | Vanity Smurf (voice) |
| 1984 | La historia interminable | Rockbiter / Falkor / G'mork / Narrator (voice) |
| 1984 | Juzgado de guardia (serie) | Dr. Fine |
| 1983 | He-Man y los Masters del Universo (serie) | Skeletor / Battle Cat / Cringer / Man-at-Arms / Mer-Man / Buzz-Off (voice) |
| 1983 | Mama's Family (serie) | — |
| 1982 | Super Ratón, el guerrero del espacio | Oil Can Harry (voice) |
| 1982 | St. Elsewhere (serie) | Ira Rosenthal |
| 1982 | El coche fantástico (serie) | General Duncton |
| 1982 | The Smurfs Springtime Special | Vanity Smurf (voice) |
| 1981 | Gimme a Break! (serie) | — |
| 1981 | Blackstar (serie) | — |
| 1981 | Trollkins (serie) | — |
| 1981 | The Kid Super Power Hour with Shazam! (serie) | — |
| 1980 | Take It to the Limit | Narrator (voice) |
| 1979 | El show de Scooby-Doo y Scrappy-Doo (serie) | Mr. Percy |
| 1979 | Hart to Hart (serie) | Cyrus St. Cyr |
| 1979 | Eischied (serie) | Captain Finnerty |
| 1979 | The New Adventures of Mighty Mouse and Heckle & Jeckle (serie) | Oil Can Harry / Swifty / Narrator (voice) |
| 1979 | Las Nuevas Aventuras De Flash Gordon (serie) | — |
| 1979 | A Pleasure Doing Business | Marvin |
| 1979 | Blind Ambition (serie) | George Simonson |
| 1978 | Peeping Times | Miles Rathbourne |
| 1977 | Lou Grant (serie) | — |
| 1977 | Enredo (serie) | Mr. Kirby |
| 1977 | Shake, Rattle and Roll (serie) | Sidney Merciless |
| 1977 | Washington: Behind Closed Doors (serie) | Simon Cappell |
| 1976 | The Gentleman Tramp | Narrator |
| 1976 | Gemini Man (serie) | — |
| 1976 | Riding with Death | Dr. Arthur Hale |
| 1975 | Fraidy Cat (serie) | Fraidy "Nine" Cat (voice) |
| 1975 | The Ghost Busters (serie) | — |
| 1975 | The Bionic Woman | Dr. Rudy Wells |
| 1975 | Los hombres de Harrelson (serie) | — |
| 1975 | Win, Place or Steal | Lt. Mannite |
| 1975 | Barney Miller (serie) | William Deats |
| 1974 | Death Sentence | Lubell |
| 1974 | Harry O (serie) | — |
| 1974 | Petrocelli (serie) | — |
| 1974 | El valle de los dinosaurios (serie) | — |
| 1974 | Hong Kong Phooey (serie) | — |
| 1974 | Murder Works Overtime | Canavan |
| 1974 | El hombre de los seis millones de dólares (serie) | Dr. Rudy Wells |
| 1974 | Happy Days (serie) | — |
| 1973 | What Are Best Friends For? | Dr. Otto Ludwig |
| 1973 | The Six Million Dollar Man: The Solid Gold Kidnapping | Dr. Rudy Wells |
| 1973 | The Six Million Dollar Man: Wine, Women and War | Dr. Rudy Wells |
| 1973 | Lotsa Luck (serie) | Monroe |
| 1973 | Almas De Metal | Chief Supervisor |
| 1972 | ABC Afterschool Special (serie) | — |
| 1971 | Nichols (serie) | Averrel |
| 1970 | The Partridge Family (serie) | Wink Burgess |
| 1970 | Three For Tahiti | Cecil Barrett |
| 1970 | McCloud (serie) | — |
| 1969 | Love, American Style (serie) | Captain Blodgett |
| 1969 | Medical Center (serie) | Dr. Harry Danfield |
| 1969 | The Courtship of Eddie's Father (serie) | Sy Freeman |
| 1969 | My World and Welcome to It (serie) | — |
| 1969 | The Bill Cosby Show (serie) | Dwight McDevitt |
| 1968 | Here Come the Brides (serie) | — |
| 1968 | Patrulla juvenil (serie) | Phil Norval |
| 1968 | Lancer (serie) | — |
| 1968 | Here's Lucy (serie) | Herb Hinkley |
| 1968 | The Name of the Game (serie) | Harvey |
| 1968 | Hawaii 5-0 (serie) | Bernie Fryer |
| 1968 | El astuto (serie) | — |
| 1967 | Mannix (serie) | — |
| 1967 | El gran Chaparral (serie) | Sweets |
| 1967 | Judd for the Defense (serie) | — |
| 1967 | He & She (serie) | Murray Mouse |
| 1967 | Ironside (serie) | — |
| 1966 | Felony Squad (serie) | — |
| 1966 | That Girl (serie) | — |
| 1965 | The F.B.I. (serie) | Gordon Frisch |
| 1965 | Mi bella genio (serie) | Congressman Farragut |
| 1965 | El Superagente 86 (serie) | — |
| 1965 | Los héroes de Hogan (serie) | Freitag |
| 1964 | Embrujada (serie) | — |
| 1960 | The Andy Griffith Show (serie) | Mr. Ruskin |
| 1959 | Los Intocables (serie) | Morgue Attendant (uncredited) |
