Filmography28 titles
| Year | Title | Character | Age at release |
|---|---|---|---|
| 2014 | Twin Peaks: The Missing PiecesMovie | Man From Another Place | 61 |
| 2010 | Scooby-Doo! Mystery IncorporatedSeries | Professor Horatio Kharon (voice) | 57 |
| 2003 | CarnivàleSeries | Samson | 50 |
| 2003 | Specter's RockMovie | The Interrogator | 50 |
| 2002 | TiptoesMovie | Bruno | 49 |
| 2001 | Mulholland DriveMovie | Mr. Roque | 48 |
| 2001 | Snow WhiteMovie | Sunday | 48 |
| 2001 | Postcards From The CastMovie | Self | 48 |
| 2001 | Reflections on the Phenomenon of Twin PeaksMovie | Self | 48 |
| 2001 | An Introduction to David LynchMovie | Self | 48 |
| 1998 | CharmedSeries | Leprechaun | 45 |
| 1998 | Ava's Magical AdventureMovie | Stretch | 45 |
| 1997 | Port CharlesSeries | — | 44 |
| 1997 | Warriors of VirtueMovie | Mudlap | 44 |
| 1997 | ScrewedMovie | himself | 44 |
| 1994 | First You Live Then You DieMovie | — | 41 |
| 1993 | The X-FilesSeries | Mr. Nutt | 40 |
| 1993 | Star Trek: Deep Space NineSeries | Rumpelstiltskin | 40 |
| 1992 | Twin Peaks: Fire Walk with MeMovie | Man From Another Place | 39 |
| 1990 | Twin PeaksSeries | The Arm | 37 |
| 1990 | Industrial Symphony No. 1: The Dream of the BrokenheartedMovie | Woodsman (Twin A) | 37 |
| 1989 | Twin PeaksMovie | The Man From Another Place | 36 |
| 1988 | MonstersSeries | Household God | 35 |
| 1988 | Silent But DeadlyMovie | Dr. Bunson | 35 |
| 1987 | Salvation!Movie | The Devil | 34 |
| 1982 | American PlayhouseSeries | Hopfrog | 29 |
| 1975 | Saturday Night LiveSeries | Ed McMahon's little helper (uncredited) | 22 |
| 1975 | Saturday Night LiveSeries | New Years Baby 1953 (uncredited) | 22 |