| 2024 | To the Journey - Looking Back at Star Trek: Voyager | Self | ★ 0.0 |
| 2024 | IDENTITEAZE | Steve | ★ 8.0 |
| 2023 | Star Trek: Picard - The IMAX Live Series Finale Event | Q (uncredited) | ★ 7.7 |
| 2020 | Ayreon: Electric Castle Live And Other Tales | Narrator | ★ 7.8 |
| 2019 | When the Train Stops | Jason Booth | ★ 0.0 |
| 2019 | Manipulated | | ★ 6.5 |
| 2018 | Buttons | Dr. Johnson | ★ 6.9 |
| 2018 | My Little Pony: Best Gift Ever | Discord | ★ 7.5 |
| 2018 | The Late Batsby | Victor Freeze/Mr. Freeze (voice) | ★ 6.2 |
| 2018 | Resurrect | Warren | ★ 6.0 |
| 2017 | Die Eiskönigin - Olaf taut auf | Mr. Olsen (voice) | ★ 6.5 |
| 2017 | Remembering Leonard: His Life, Legacy and Battle with COPD | Himself | ★ 5.5 |
| 2016 | 50 Years of Star Trek | Self | ★ 6.6 |
| 2015 | Visions | Victor Napoli | ★ 5.3 |
| 2015 | Hypnotized | | ★ 5.0 |
| 2014 | Chaos on the Bridge | Self | ★ 7.0 |
| 2014 | My Little Pony Friendship is Magic: Keys of Friendship | Discord | ★ 8.8 |
| 2012 | Bronies: The Extremely Unexpected Adult Fans of My Little Pony | Himself | ★ 5.0 |
| 2012 | Zombie Hamlet | Jerry | ★ 5.5 |
| 2012 | Recreator | Dr. Frank Miller | ★ 4.7 |
| 2011 | The Captains | Self | ★ 6.3 |
| 2009 | Gamer | Chief Of Staff | ★ 5.7 |
| 2009 | Crank 2 - High Voltage | Fish Halman | ★ 6.1 |
| 2008 | Pathology | Dr. Quentin Morris | ★ 5.7 |
| 2008 | My Apocalypse | Nathan Eastman | ★ 4.8 |
| 2007 | Die Liebe in mir | Nigel Pennington | ★ 7.2 |
| 2004 | Liliths Fluch | Faith Director Chapel | ★ 5.0 |
| 2004 | The Eavesdropper | Dr. Gene Kramer | ★ 5.2 |
| 2003 | Burl's | Mr Cooper | ★ 6.4 |
| 2002 | The Big Time | Vaughn Clay | ★ 0.0 |
| 2002 | Return to Area 51 | Narrator | ★ 7.3 |
| 2001 | Good Advice - Guter Rat ist teuer | Ted | ★ 5.9 |
| 2000 | Gen¹³ | Colonel John 'Jack' Lynch (voice) | ★ 6.1 |
| 2000 | Woman on Top | Alex Reeves | ★ 6.1 |
| 1999 | Final Speed – Stoppt den Todeszug! | George Bouchard | ★ 5.5 |
| 1999 | Border Line | Rolf Berger | ★ 4.0 |
| 1998 | Sir Arthur Conan Doyle’s Lost World | Lord John Roxton | ★ 6.0 |
| 1998 | Lucky, der reichste Hund der Welt | Lyle Windsor | ★ 5.6 |
| 1997 | Trekkies | Self | ★ 6.3 |
| 1997 | Aircrash - Katastrophe beim Take Off | Capt. George W. Bouchard | ★ 5.1 |
| 1996 | Ravenhawk - Lautlos und tödlich | Stansfield | ★ 4.0 |
| 1996 | Vier lieben Dich | Ted | ★ 5.8 |
| 1995 | Evolver | Russell Bennett | ★ 5.3 |
| 1994 | Without Warning | Barry Steinbrenner | ★ 6.7 |
| 1994 | Schemes | Arthur Martin | ★ 4.5 |
| 1994 | Star Trek: The Next Generation - All Good Things... | Q | ★ 10.0 |
| 1994 | Journey's End - The Saga of Star Trek: The Next Generation | Self | ★ 7.0 |
| 1994 | Deep Red | Thomas Newmeyer | ★ 4.4 |
| 1993 | Fearless - Jenseits der Angst | Jeff Gordon | ★ 6.9 |
| 1993 | Cyber World | Difford | ★ 4.7 |
| 1992 | Auf der Sonnenseite des Lebens | Paul / Walter Thackary | ★ 5.5 |
| 1992 | Die Hand an der Wiege | Dr. Victor Mott | ★ 6.9 |
| 1991 | 25 Jahre Star Trek | Self | ★ 5.7 |
| 1991 | König der Fischer | TV Executive | ★ 7.3 |
| 1990 | Spur in den Tod 3 | Jeffrey | ★ 0.0 |
| 1990 | Filofax - Ich bin du und du bist nichts | Ted Bradford Jr. | ★ 6.3 |
| 1990 | Todfreunde - Bad Influence | Howard | ★ 6.0 |
| 1989 | Die nackte Bombe II | Maj. Waterhouse | ★ 5.3 |
| 1987 | On Fire | Bobby Holicker | ★ 0.0 |
| 1981 | The Miracle of Kathy Miller | Dr. Christensen | ★ 7.0 |
| 1980 | Ein Walzer vor dem Frühstück | Allan | ★ 4.6 |
| 1980 | Nightside | Willy Potts | ★ 0.0 |
| 1979 | Mord im Zwiebelfeld | LAPD Lieutenant | ★ 6.1 |
| 1978 | The Bastard | Lt. Stark | ★ 5.0 |
| 1978 | The Lazarus Syndrome | EKG Doctor (uncredited) | ★ 4.6 |
| 1977 | Der Mann, der Berge versetzt | Clark | ★ 6.0 |
| 1977 | Todesflug | Bob Connors | ★ 5.3 |
| 1975 | Legacy | | ★ 0.0 |
