| 2023 | La diplomática (serie) | President William Rayburn |
| 2022 | Who Done It: The Clue Documentary | Self |
| 2022 | La fórmula ganadora de Jerry y Marge | Howard |
| 2021 | Una estafa celestial | Frank |
| 2021 | Los Rugrats (serie) | Grandpa Lou Pickles (voice) |
| 2020 | Pink Skies Ahead | Richard |
| 2020 | Bendita paciencia (serie) | Michael |
| 2019 | Image Makers: The Adventures of America's Pioneer Cinematographers | Narrator (voice) |
| 2019 | Good Omens (serie) | Sergeant Shadwell |
| 2016 | The Good Place (serie) | Doug Forcett |
| 2016 | 50 Years of Star Trek | Self |
| 2016 | Una Madre Imperfecta | Mark |
| 2016 | Talking Saul (serie) | Invitado especial |
| 2016 | Billions (serie) | Melville Revere |
| 2015 | Food: Fact or Fiction? (serie) | Himself |
| 2015 | Grace y Frankie (serie) | Jack |
| 2015 | Better Call Saul (serie) | Chuck McGill |
| 2014 | The 7D (serie) | Uncle Humidor (voice) |
| 2013 | 10 Rules for Sleeping Around | Jeffrey Fields |
| 2012 | Batman: El regreso del Caballero Oscuro, Parte 1 | Dr. Bartholomew Wolper (voice) |
| 2012 | Veep (serie) | Governor Ballentine |
| 2011 | Homeland (serie) | Jeffrey Turner |
| 2011 | ThunderCats (serie) | Vultaire (voice) |
| 2011 | Finales felices (serie) | Big Dave |
| 2011 | Lejos de todo (serie) | Ed Greenman |
| 2010 | Glory Daze (serie) | — |
| 2010 | Pure Country 2: El Don | Angel Joseph |
| 2009 | Unwigged & Unplugged: An Evening with Christopher Guest, Michael McKean and Harry Shearer | Self |
| 2009 | Stonehenge: 'Tis a Magic Place | David St. Hubbins |
| 2009 | Si la cosa funciona | Joe - Boris' Friend #3 |
| 2009 | Spinal Tap: Back from the Dead | David St. Hubbins |
| 2009 | Castle (serie) | Victor Baron |
| 2008 | Childrens Hospital (serie) | Death |
| 2008 | Adventures of Power | Harlan |
| 2007 | El hijo del mal (Joshua) | Chester |
| 2006 | The Year Without a Santa Claus | Snow Miser |
| 2006 | Help Me Help You (serie) | — |
| 2006 | The Unit (serie) | — |
| 2006 | Open Wide: Tooth School Inside | Dr. Flossman (voice) |
| 2005 | Arnie the Doughnut | Narrator / Arnie the Doughnut (voice) |
| 2005 | Hopeless Pictures (serie) | — |
| 2005 | Candor City Hospital | Patient |
| 2005 | Padre made in USA (serie) | Emperor Zing (voice) |
| 2004 | Boston Legal (serie) | Dwight Biddle |
| 2004 | The Secret Policeman's Ball: The Music Edition | David St. Hubbins |
| 2004 | The Tony Danza Show (serie) | Invitado especial |
| 2003 | Presentando a Pancho Villa | William Christy Cabanne |
| 2003 | Un poderoso viento | Jerry Palter |
| 2003 | The Haunted Lighthouse | Captain Van Legge |
| 2003 | Real Time with Bill Maher (serie) | Self |
| 2003 | Jimmy Kimmel Live! (serie) | — |
| 2002 | 100 Millas | Howard |
| 2002 | El gurú del sexo | Dwain |
| 2002 | Teddy Bears' Picnic | Porterfield 'Porty' Pendleton |
| 2002 | El jorobado de Notre Dame 2: El secreto de la campana | Sarousch (voice) |
| 2001 | La liga de la justicia (serie) | The Sportsman / Sgt. O'Shaughnessey (voice) |
| 2001 | La banda del patio: Milagro en la calle tercera | Mr Bream (voice) |
| 2001 | Smallville (serie) | Perry White |
| 2001 | Educando a J. | Bob |
| 2001 | Alias (serie) | Atticus Liddell |
| 2001 | Oswald (serie) | Louie (voice) |
| 2001 | Primetime Glick (serie) | Adrien Van Voorhees |
| 2001 | Never Again | Alex The Transvestite |
| 2001 | Los tiradores solitarios (serie) | — |
| 2001 | El proyecto Z (serie) | — |
| 2000 | Harvey Birdman, el abogado (serie) | Evelyn Spyro Throckmorton (voice) |
| 2000 | Ginger (serie) | Bobby Lightfoot (voice) |
| 2000 | Larry David (serie) | Matt Tessler |
| 2000 | Catching Up with Marty DiBergi | David St. Hubbins |
| 2000 | The Huntress (serie) | — |
| 2000 | Strip Mall (serie) | — |
| 2000 | Clerks (serie) | Professor Ram / Creepy Old Guy (voice) |
| 1999 | Snowden's Christmas | (voice) |
| 1999 | The Early Show (serie) | David St. Hubbins |
| 1999 | Ley y orden: Unidad de Víctimas Especiales (serie) | Kurt Sandow |
| 1999 | Secuestrando a la Srta. Tingle | Principal Potter |
| 1999 | Where Are They Now? (serie) | Self |
| 1999 | Bob Esponja (serie) | Captain Frostymug (voice) |
| 1999 | Padre de familia (serie) | Pengrove Pig / Andy Rooney / Camel Salesman (voice) |
| 1999 | Kill the Man | Mr. Livingston |
| 1999 | Batman del futuro (serie) | Ian Peek (voice) |
| 1999 | Providence (serie) | Sherman Smith |
| 1998 | Archibald the Rainbow Painter | J.P. Bigelow |
| 1998 | Final Justice | Merle Hammond |
| 1998 | El desfiladero | Willie L. |
| 1998 | LateLine (serie) | — |
| 1997 | Veronica's Closet (serie) | Dave Whitby |
| 1997 | The Weird Al Show (serie) | Miner |
| 1997 | 101 Dálmatas: La Serie (serie) | Jasper Badun (voice) |
| 1997 | Las nuevas aventuras de Batman (serie) | 50's Joker (voice) |
| 1997 | Casper: La primera aventura | Bill Case |
| 1997 | The View (serie) | Self |
| 1997 | Nada que perder | Phillip "P.B." Barrow |
| 1997 | Un gato del FBI | Peter Randall |
| 1996 | ¡Oye, Arnold! (serie) | — |
| 1996 | Los Cachorros del Libro de la Selva (serie) | — |
| 1996 | Road Rovers (serie) | Dr. Jeffrey Otitus (voice) |
| 1996 | La pareja chiflada | Scott Grogan |
| 1996 | Edie & Pen | Rick |
| 1996 | Tracey Takes On... (serie) | Barry |
| 1995 | Mr. Show with Bob and David (serie) | Professor Peens |
| 1995 | Caroline in the City (serie) | Father Damian |
| 1995 | Star Trek: Voyager (serie) | The Clown |
| 1994 | Asesinatos en la radio | Rick Rochester |
| 1994 | Friends (serie) | Mr. Rastatter |
| 1994 | MacShayne: Final Roll of the Dice | Ozzie Evans |
| 1994 | El fantasma del Espacio de costa a costa (serie) | — |
| 1993 | La niñera (serie) | Professor Noel Babcock PhD |
| 1993 | Yo y el mundo (serie) | — |
| 1993 | Animaniacs (serie) | Spink (voice) |
| 1993 | Lois y Clark: Las Nuevas Aventuras de Superman (serie) | — |
| 1993 | Expediente X (serie) | Morris Fletcher |
| 1992 | The Return of Spinal Tap | David St. Hubbins / Jerry Palter |
| 1992 | Ella nunca se niega | Eddy Revere |
| 1992 | Memorias de un hombre invisible | George Talbot |
| 1991 | Dinosaurios (serie) | Dr. Herder (voice) |
| 1990 | Sigue soñando (serie) | Gibby Fiske |
| 1990 | Flashback | Hal Cresciman |
| 1990 | Grand (serie) | Tom Smithson |
| 1989 | Los Simpson (serie) | David St. Hubbins (voice) |
| 1989 | The Big Picture | Emmet Sumner |
| 1989 | En el silencio de la noche | Phil Dreyer |
| 1988 | Las chicas de la Tierra son fáciles | Woody |
| 1988 | Cortocircuito 2 | Fred Ritter |
| 1988 | Peripecias de un director | Michael Fields |
| 1987 | Mejor solo que mal acompañado | State Trooper |
| 1987 | Double Agent | Jason Starr / Warren Starbinder |
| 1987 | Rock Star | Bu Montgomery |
| 1986 | Davy Crockett | Mr. Wallace |
| 1986 | Classified Love | Pete Newly |
| 1986 | Johnny Appleseed | Mac Macintosh |
| 1985 | El juego de la sospecha (Cluedo) | Mr. Green |
| 1985 | Tall Tales & Legends (serie) | Mac Macintosh |
| 1985 | D.A.R.Y.L. | Andy Richardson |
| 1984 | Jeopardy! (serie) | — |
| 1984 | This Is Spinal Tap | David St. Hubbins |
| 1982 | Los locos del bisturí | Dr. Simon August |
| 1981 | Likely Stories Vol. 1 | — |
| 1980 | Fridays (serie) | — |
| 1980 | Goodtime Girls (serie) | — |
| 1980 | Spinal Tap: The Final Tour | David St. Hubbins |
| 1979 | CBS News Sunday Morning (serie) | Self |
| 1977 | Cracking Up | — |
| 1976 | Laverne & Shirley (serie) | Lenny |
| 1975 | Saturday Night Live (serie) | Self - Various Characters |
| 1974 | Happy Days (serie) | — |
| 1961 | The Mike Douglas Show (serie) | Self |
