2025
Everybody's Live with John Mulaney as Self - Willy Loman, Weston Playhouse, Weston, VT, 2010 (Pre-Tape Segment)2025
Nobody 2 as David Mansell2024
Knuckles as Chief Pachacamac (voice)2024
Self Reliance as Dennis Walcott2024
Man and Witch: The Dance of a Thousand Steps as The Alchemist2024
Guns & Moses as Sol Fassbinder2023
Nandor Fodor and the Talking Mongoose as Dr. Harry Price2023
Camp Hideout as Falco2022
Spirit Halloween: The Movie as Alex Windsor2022
Who Done It: The Clue Documentary as Self (archive footage)2022
Tankhouse as Buford2021
Hacks as Larry Arbuckle2021
The Center Seat: 55 Years of Star Trek as Self2021
Nobody as David Mansell2021
Expedition: Back To The Future as Self2021
The Tender Bar as Grandpa Maguire2021
Next Stop, Christmas as Ticket Agent/Conductor2021
Queen Bees as Arthur Lane2021
Senior Moment as Sal Spinelli2021
King Lear as King Lear2020
Stars in the House as Self2020
Reunited Apart as Self2019
The Mandalorian as Commissioner Helgait2019
That Guy... Who Was In That Thing 3: Trek Stars as Self2019
Dr. Jack & Mr. Nicholson as Self2019
The Haunted Swordsman as The Black Monk2018
A Million Little Things as Christopher Lloyd2018
The Conners as Lou Vitore2018
A.P. Bio as Melvin2018
James Cameron's Story of Science Fiction as Self2018
Boundaries as Stanley2018
Making a Killing as Lloyd Mickey2018
One by One as Harvey2018
ReRUN as George Benson (old)2017
Going in Style as Milton Kupchak2017
Muse as Bernard Rauschen2017
The Sound as Clinton Jones2016
I Am Not a Serial Killer as Mr. Crowley2016
Donald Trump's The Art of the Deal: The Movie as Doc Brown2016
For the Love of Spock as Commander Kruge (archive footage)2016
50 Years of Star Trek as Self2016
Cold Moon as James Redfield2016
Must See TV: An All Star Tribute to James Burrows as Self2015
12 Monkeys as The Missionary2015
12 Monkeys as The Missionary (uncredited)2015
12 Monkeys as Zalmon Shaw / The Missionary2015
Back in Time as Self2015
88 as Cyrus2015
Just in Time for Christmas as Grandpa Bob2015
The Boat Builder as Abner2015
Back To the Present: The Special as Not available2015
Doc Brown Saves the World as Emmett Brown2015
Keith Lemon's Back t'Future Tribute as Self2014
Over the Garden Wall as The Woodsman (voice)2014
The Real History of Science Fiction as Himself2014
Sin City: A Dame to Kill For as Kroenig2014
Buenas noches as Self2014
A Million Ways to Die in the West as Doc Brown2014
Pirate's Code: The Adventures of Mickey Matson as Grandpa Jack2014
Zodiac as Harry Setag2014
Blood Lake: Attack of the Killer Lampreys as Mayor Akerman2014
The One I Wrote for You as Pop2013
The Michael J. Fox Show as Principal McTavish2013
Sid the Science Kid: The Movie as Dr. Bonabodon (voice)2012
Piranha 3DD as Mr. Goodman2012
Dead Before Dawn as Horus Galloway2012
Foodfight! as Mr. Clipboard (voice)2012
The Adventures of Mickey Matson and the Copperhead Conspiracy as Grandpa Jack2012
The Oogieloves in the Big Balloon Adventure as Lero Sombrero2012
Dorothy and the Witches of Oz as The Wizard Of Oz2012
Excuse Me for Living as Lars2012
Last Call as Pete2012
Anything but Christmas as Harry2012
The Narrative of Victor Karloch as Victor Karloch2012
Say It Ain't Solo as Himself2012
Cadaver as Cadaver2011
The Witches of Oz as The Wizard of Oz2011
Love, Wedding, Marriage as Dr. George2011
InSight as Shep2011
The Chateau Meroux as Nathan2011
Once Upon a Time… One Flew Over the Cuckoo's Nest as Not available2011
Adventures of Serial Buddies as Dr. Von Gearheart2010
R. L. Stine's The Haunting Hour as Grandpa Walt Montgomery2010
Raising Hope as Dennis Powers2010
Piranha 3D as Mr. Goodman2010
Snowmen as The Caretaker2010
Magic as Magic (voice)2010
Tales from the Future as Self2009
Knights of Bloodsteel as Tesselink2009
Live from Studio Five as Self2009
Meteor as Prof. Daniel Lehman2009
Jack and the Beanstalk as Headmaster2009
Santa Buddies as Stan Cruge2009
Call of the Wild as 'Grandpa' Bill Hale2009
A Very Sunny Christmas as Santa Claus John #2 (uncredited)2009
Making of One Flew Over the Cuckoo's Nest as Self2009
Looking Back to the Future as Self2009
The Macabre World of Lavender Williams as Lester (voice)2008
Fringe as Roscoe Joyce2008
The Tale of Despereaux as Hovis (voice)2008
Fly Me to the Moon as Amos (voice)2008
Camelot: Live from Lincoln Center as King Pellinore2007
The Big Bang Theory as Theodore2007
Chuck as Dr. Leo Dreyfus2007
The Alan Titchmarsh Show as Self2007
Head Case as Self2007
Flakes as Willie2006
Psych as Martin Kahn2006
A Perfect Day as Michael2006
Valerie on the Stairs as Everett Neely2006
Looking Back at the Future as Himself2005
Numb3rs as Not available2005
Masters of Horror as Not available2005
Stacked as Harold March2005
Arthur Hailey's Detective as Anderson in Launderette2005
Bad Girls from Valley High as Mr. Chauncey2005
Here Comes Peter Cottontail: The Movie as Seymour S. Sassafras (voice)2004
The Tony Danza Show as Self2004
Clubhouse as Lou Russo2004
I Dream as Professor Toone2004
Admissions as Steward Worthy2004
Car Crash: The Delorean Story as Himself2003
NCIS as Joseph Smith2003
Tremors as Dr. Cletus Poffenberger2003
Haunted Lighthouse 4-D as Cap'n Jack2003
Merry Christmas Space Case as Narrator (voice)2002
Cyberchase as Hacker (voice)2002
Interstate 60 as Ray2002
Hey Arnold! The Movie as Coroner (voice)2002
Wish You Were Dead as Bruce2002
The Big Time as Doc Powers2001
Law & Order: Criminal Intent as Carmine2001
Wit as Dr. Harvey Kelekian2001
On the Edge as Attorney Bum (segment "Happy Birthday")2001
When Good Ghouls Go Bad as Uncle Fred Walker2001
Chasing Destiny as Jet James2001
Space Case as Narrator (voice)2001
Kids World as Leo2000
Malcolm in the Middle as Walter2000
Ed as Burt Kiffle2000
Convergence as Morley Allen1999
The West Wing as Professor Lawrence Lessig1999
My Favorite Martian as Uncle Martin1999
Alice in Wonderland as White Knight1999
Man on the Moon as Self (uncredited)1999
Baby Geniuses as Heep1999
The Emperor's Treasure as Lord Imaru (voice)1999
It Came From the Sky as Jarvis Moody1998
The Real Blonde as Ernst1998
The Ransom of Red Chief as Sam Howard1998
The Animated Adventures of Tom Sawyer as Judge Thatcher (voice)1997
King of the Hill as Smitty (voice)1997
Anastasia as Rasputin (voice)1997
Quicksilver Highway as Aaron Quicksilver1997
Angels in the Endzone as Al1997
Dinner at Fred's as Dad1997
Changing Habits as Theo Teagarden1997
Completely Cuckoo as Self1996
Spin City as Owen Kingston1996
Spin City as Owen Kingston (archive footage)1996
The Right to Remain Silent as Johnny Benjamin1996
Cadillac Ranch as Wood Grimes1995
Deadly Games as Sebastian Jackal1995
Things to Do in Denver When You're Dead as Pieces1995
Rent-a-Kid as Lawrence 'Larry' Kayvey1995
Mr. Payback: An Interactive Movie as Ed Jarvis1994
The Pagemaster as Mr. Dewey1994
Angels in the Outfield as Al the Angel1994
Camp Nowhere as Dennis Van Welker1994
Radioland Murders as Zoltan1994
The Making of 'The Pagemaster' as Mr. Dewey - Host1994
In Search of Dr. Seuss as Mr. Hunch1993
Fallen Angels as Continental Op1993
Addams Family Values as Uncle Fester1993
Dennis the Menace as Switchblade Sam1993
Twenty Bucks as Jimmy1992
Dead Ahead: The Exxon Valdez Disaster as Frank Iarossi - Exxon1992
T Bone N Weasel as Weasel1991
Back to the Future as Emmett Brown1991
The Addams Family as Uncle Fester1991
Suburban Commando as Charlie Wilcox1991
Back to the Future: The Ride as Doctor Emmet Brown1990
Back to the Future Part III as Doctor Emmett Brown1990
DuckTales: The Movie - Treasure of the Lost Lamp as Merlock (voice)1990
Why Me? as Bruno Daley1990
The Earth Day Special as Dr. Emmett L. Brown1990
The Secrets of the 'Back to the Future' Trilogy as Dr. Emmett Brown (archive footage)1989
The Simpsons as Reverend Jim Ignatowski (voice)1989
Back to the Future Part II as Doctor Emmett Brown1989
The Dream Team as Henry Sikorsky1988
Who Framed Roger Rabbit as Judge Doom1988
Eight Men Out as Bill Burns1988
Track 29 as Henry Henry1988
Roger Rabbit and the Secrets of Toon Town as Self1987
Walk Like a Man as Reggie Shand / Henry Shand1987
Legend of the White Horse as Jim Martin1986
Amazing Stories as R. Beanes1986
Miracles as Harry1985
Amazing Stories as Professor B.O.Beanes1985
Street Hawk as Anthony Corrido1985
Back to the Future as Emmett Brown1985
Clue as Professor Plum1984
The Adventures of Buckaroo Banzai Across the 8th Dimension as John Bigboote1984
Star Trek III: The Search for Spock as Cmdr. Kruge1984
Joy of Sex as Coach Hindenberg1984
Street Hawk: The Movie as Anthony Corrido1984
The Cowboy and the Ballerina as Not available1983
Mr. Mom as Larry1983
To Be or Not to Be as Capt. Schultz1983
September Gun as Jack Brian1982
Cheers as Phillip Semenko1982
National Lampoon's Movie Madness as Samuel Starkman ("Municipalians")1982
Money on the Side as Sergeant Stampone1981
Best of the West as The Calico Kid1981
The Postman Always Rings Twice as The Salesman1981
The Legend of the Lone Ranger as Maj. Bartholomew 'Butch' Cavendish1980
Semi-Tough as Not available1980
Schizoid as Gilbert1980
The Black Marble as Arnold's Collector1979
The Lady in Red as Frognose1979
Butch and Sundance: The Early Days as Bill Carver1979
The Onion Field as Jailhouse Lawyer1978
Taxi as Reverend Jim Ignatowski1978
Taxi as Reverend Jim 'Iggy' Ignatowski1978
The Word as Hans Bogardus1978
Goin' South as Towfield1975
Saturday Night Live as Self - Cameo (uncredited)1975
Barney Miller as Arnold Scully1975
Barney Miller as Vincent Carew1975
One Flew Over the Cuckoo's Nest as Max TaberNaN
Untitled Lani Pixels Project as Grandpa (voice)1979
The Fantastic Seven as Skip Hartman1978
Lacy and the Mississippi Queen as Jennings1977
Three Warriors as Not availableNaN
The Movers as Not availableNaN
Meteor as Prof. Daniel LehmanNaN
Amazing Stories: The Movie I as Professor (archive footage)1980
Pilgrim, Farewell as Paul1977
Another Man, Another Chance as Jesse James (uncredited)1956
Tony Awards as Self - Performer (uncredited)2009
Looking Back to the Future Thanks