| Tahun |
Judul |
Peran |
Catatan |
Ref. |
| 1981 |
Senior Trip |
Pete |
Film televisi |
|
| 1984–1985 |
E/R |
Harold Stickley |
15 episode |
|
| 1986 |
Rockabye |
Lt. Ernest Foy |
Film televisi |
|
| 1987 |
Everything's Relative |
Julian Beeby |
10 episodes |
|
| 1988 |
Newhart |
Ramming |
Episode: "Courtin' Disaster" |
|
| 1989–1998 |
Seinfeld |
George Costanza |
Peran utama; 178 episodes |
|
| 1992–1993 |
Dinosaurs |
Berbagai suara |
Peran yang berulang; 7 episodes |
|
| 1993 |
Dream On |
Randall Townsend |
Episode: "Oral Sex, Lies and Videotape" |
|
| 1993–1998 |
Saturday Night Live |
Himself |
2 episodes |
|
| 1994–1997 |
Duckman |
Eric Duckman (suara) |
Peran utama; 70 episodes |
|
| 1994, 1998 |
The Larry Sanders Show |
Himself |
2 episodes |
|
| 1994 |
Aladdin |
Abis Mal (suara) |
Peran yang berulang; 14 episodes |
|
| 1995 |
Bye Bye Birdie |
Albert Peterson |
Film televisi |
|
| 47th Primetime Emmy Awards |
Himself (co-host) |
Spesial televisi |
|
| 1996 |
Muppets Tonight |
Himself |
Episode: "Jason Alexander" |
|
| The Nanny |
Jack |
Episode: "The Tart with Heart" |
|
| Sesame Street |
Himself |
Episode 3557 |
|
| 1997 |
Remember WENN |
Alan Ballinger |
Episode: "Nothing Up My Sleeve" |
|
| Cinderella |
Lionel |
Film televisi |
|
| 1998–1999 |
Hercules |
Poseidon (suara) |
Peran yang berulang; 7 episodes |
|
| 1999 |
Jingle Bells |
Elf |
Suara; Film televisi |
|
| Ultimate Trek: Star Trek's Greatest Moments |
Captain James T. Kirk |
Spesial televisi |
|
| Star Trek: Voyager |
Kurros |
Episode: "Think Tank" |
|
| 1999–2000 |
Dilbert |
Catbert (suara) |
Peran utama; 9 episodes |
|
| 2001, 2009 |
Curb Your Enthusiasm |
Himself |
Peran yang berulang; 5 episodes |
|
| 2001 |
Friends |
Earl |
Episode: "The One Where Rosita Dies" |
|
| Bob Patterson |
Bob Patterson |
Peran utama; 10 episodes; juga produser eksekutif |
|
| The Legend of Tarzan |
Zutho |
Suara, episode: "Tarzan and the Face from the Past" |
|
| 2002 |
Son of the Beach |
Tex Finklestein |
Episode: "Penetration Island" |
|
| House of Mouse |
Hugo |
Suara; Episode: "Donald Wants to Fly" |
|
| The Twilight Zone |
Kematian |
Episode: "One Night at Mercy" |
|
| The Man Who Saved Christmas |
A.C. Gilbert |
Film televisi |
|
| 2003 |
Malcolm in the Middle |
Leonard |
Episode: "Future Malcolm" |
|
| 2004–2005 |
Listen Up |
Tony Kleinman |
Peran utama; juga produser |
|
| 2004 |
A Christmas Carol |
Jacob Marley |
Film televisi |
|
| 2005 |
Monk |
Marty Eels |
Episode: "Mr. Monk and the Other Detective" |
|
| 2006 |
Odd Job Jack |
Don |
Suara; episode: "Twenty-One You're Dead" |
|
| Campus Ladies |
Professor |
Episode: "A Very Special Episode" |
|
| 2006–2007 |
Everybody Hates Chris |
Principal Edwards |
2 episodes |
|
| 2008 |
The New Adventures of Old Christine |
Dr. Palmer |
Episode: "One and a Half Men" |
|
| Criminal Minds |
Prof. Rothchild |
Episode: "Masterpiece" |
|
| 2009 |
Meteor |
Dr. Chetwyn |
2 episodes |
|
| 2010–2013 |
Fish Hooks |
Mr. Nibbles |
Suara; 3 episodes |
[4] |
| The Cleveland Show |
Saul Friedman |
Suara; 2 episodes |
|
| 2010, 2023 |
American Dad! |
Sal / Mr. Orlando |
Suara; 2 episodes |
|
| 2011 |
Glenn Martin, DDS |
Brandon |
Suara; episode: "GlenHog Day" |
|
| Franklin & Bash |
Carter Lang |
Episode: "Big Fish" |
|
| Harry's Law |
Richard Cross |
Episode: "Bad to Worse" |
|
| China, IL |
Harold |
Suara; 2 episodes |
|
| A Fairly Odd Movie: Grow Up, Timmy Turner! |
Human Cosmo |
Film televisi |
|
| 2011–2012 |
Dora the Explorer |
Owl |
Suara; 3 episodes |
[4] |
| 2012 |
Two and a Half Men |
Dr. Goodman |
Episode: "The Straw in My Donut Hole" |
|
| Clipaholics |
Narrator |
Suara; peran utama |
|
| 2013 |
Community |
Mountain Man |
Episode: "Intro to Felt Surrogacy" |
|
| 2014 |
Comedians in Cars Getting Coffee |
George Costanza |
Episode: "George Costanza: The Over-Cheer" |
|
| Kirstie |
Stanford Temple |
Episode: "Maddie's Agent" |
|
| Comedy Bang! Bang! |
Inspector Gantlet |
Episode: "Jenna Fischer Wears a Floral Blouse & Black Heels" |
|
| How Murray Saved Christmas |
Doc Holiday |
Suara; Film televisi |
|
| 2014–2017 |
The Tom and Jerry Show |
Rick (suara) |
Suara; 11 episodes |
[4] |
| 2015 |
Big Time in Hollywood, FL |
Himself |
Episode: "The Hand That Feeds" |
|
| Penn Zero: Part-Time Hero |
Coach Wallace |
Suara; episode: "Ultrahyperball" |
[4] |
| Drunk History |
William "Boss" Tweed |
Episode: "Journalism" |
|
| League of Legends with Videogamedunkey |
Himself |
Episode: "Brucer Zin Zow" |
|
| 2015–2016 |
The Grinder |
Cliff Bemis |
4 episodes |
|
| TripTank |
Various voices |
6 episodes |
[4] |
| 2016 |
The Mark Lembeck Technique |
Mark Lembeck |
Pilot |
|
| 2017 |
Animals. |
Algae |
Suara, episode: "Rats" |
[4] |
| The Simpsons |
Bourbon Verlander |
Suara; episode: "The Caper Chase" |
|
| Hit the Road |
Ken Swallow |
Peran utama; juga rekan pencipta, penulis, dan produser eksekutif |
|
| 2017–2018 |
Kody Kapow |
Goji |
Suara; Peran yang berulang |
|
| 2017, 2019 |
Robot Chicken |
Krampus |
Suara; 2 episodes |
|
| 2018–2022 |
Young Sheldon |
Gene Lundy |
5 episodes |
|
| 2018 |
Broadway: Beyond the Golden Age |
Himself |
Dokumenter |
|
| 2018–2019 |
The Orville |
Olix |
2 episodes |
|
| 2019 |
The Bug Diaries |
Cicada |
Suara; episode: "Worm's New Digs" |
|
| Richard Lovely |
Mr. Mouse |
Suara; Pilot |
|
| Pinky Malinky |
Mayor Hop |
Suara; Peran yang berulang |
[4] |
| Mad About You |
Himself |
Episode: "Real Estate for Beginners" |
|
| 2019–sekarang |
Harley Quinn |
Sy Borgman |
Suara, 13 episodes |
[4] |
| 2019–2022 |
The Marvelous Mrs. Maisel |
Asher Friedman |
4 episodes |
|
| 2021 |
The Conners |
Pastor Phil |
2 episodes |
|
| The Problem with Jon Stewart |
Jeff Bezos |
Episode: "Working-Class Economy" |
|
| 2022 |
Out of Office |
Eliza's Dad |
Film televisi |
|
| 2022–2024 |
Star Trek: Prodigy |
Doctor Noum |
Suara; 23 episodes |
|
| 2023 |
History of the World, Part II |
Maurice Cheeks |
Episode: "VI" |
|
| 2024 |
Rock, Paper, Scissors |
Jonathan Fartjoke |
Suara; Episode: "Potato/The Fart Joke Debate" |
|
| Y llegaron de noche |
Carl Laemmle |
4 episodes |
|