 | Mission: Impossible - The Final Reckoning (2025)
NSA |
 | Inside No. 9: The Party's Over (2024)
Self |
 | National Theatre Live: The Motive and the Cue (2024)
Sir John Gielgud |
 | The Hound of the Baskervilles (2023)
Sherlock Holmes |
 | Hammer A.D. 2023 (2023)
Self |
 | Mission: Impossible - Dead Reckoning Part One (2023)
NSA |
 | A Christmas Carol: A Ghost Story (2022)
Jacob Marley |
 | Peter Davison: Uncut! (2022)
|
 | The Road Dance (2022)
Doctor MacLean |
 | Operation Mincemeat (2022)
Ivor Montazac |
 | The Amazing Mr. Blunden (2021)
Mr. Wickens |
 | Memento Mori (2021)
Henry Huxley |
 | The Sparks Brothers (2021)
Self |
 | A Silent Imprisonment (2021)
Mr Murphy |
 | Locked Down (2021)
Donald |
 | The Father (2020)
The Man |
 | Cold War Steve Meets the Outside World (2020)
Self |
 | Tales of the Uncanny (2020)
Self |
 | Scandal & Beauty: Mark Gatiss on Aubrey Beardsley (2020)
Himself |
 | In Search of Dracula (2020)
Himself - Presenter |
 | Doctor Who and the Third Man (2019)
Himself |
 | Brexit: The Uncivil War (2019)
Peter Mandelson (voice) |
 | The Dead Room (2018)
Radio Announcer (voice) |
 | The Favourite (2018)
Lord Marlborough |
 | National Theatre Live: The Madness of George III (2018)
George III |
 | The League of Gentlemen - Live Again! (2018)
Various Characters |
 | Mark Gatiss on John Minton: The Lost Man of British Art (2018)
Himself - Presenter |
 | Christopher Robin (2018)
Giles Winslow |
 | The Mercy (2018)
Ronald Hall |
 | Doctor Who: Twice Upon a Time (2017)
The Captain |
 | Mars: a Traveller's Guide (2017)
Narrator |
 | Against the Law (2017)
Dr. Landers |
 | Denial (2016)
Professor Robert Jan van der Pelt |
 | Absolutely Fabulous: The Movie (2016)
Joel |
 | Our Kind of Traitor (2016)
Billy Matlock |
 | Dad's Army (2016)
Colonel Theakes |
 | Mark Gatiss: A Study in Sherlock (2016)
Himself |
 | Sherlock: The Abominable Bride (2016)
Mycroft Holmes |
 | Victor Frankenstein (2015)
Dettweiler |
 | Premium Bond with Mark Gatiss and Matthew Sweet (2015)
Himself |
 | The Vote (2015)
Steven Crosswell |
| | Release the Hound! (2015)
Self |
 | Coalition (2015)
Peter Mandelson |
 | 50 Years of BBC Two Comedy (2014)
Self |
 | National Theatre Live: Coriolanus (2014)
Menenius Agrippa |
 | Unlocking Sherlock (2014)
Himself / Mark Gatiss |
 | M.R. James: Ghost Writer (2013)
Presenter |
 | Doctor Who Live: The Next Doctor (2013)
Self |
 | Doctor Who: The Great Detective (2012)
Narrator |
 | Horror Europa with Mark Gatiss (2012)
Self - Host |
 | The Real Sherlock Holmes (2012)
Self |
 | Back to Black: The Making of Dracula Prince of Darkness (2012)
Self - Actor and Writer |
 | Cleaning Up (2011)
Mr Jackson |
 | The First Men in the Moon (2010)
Cavor |
 | Unlocking Sherlock (2010)
Himself |
 | Worried About the Boy (2010)
Malcolm McLaren |
| | Ghosts in the Machine (2009)
Himself |
 | Spanish Flu: The Forgotten Fallen (2009)
Ernest Dunks |
 | New Town (2009)
Duff Purves |
 | Consenting Adults (2007)
PC Butcher |
 | The Worst Journey in the World (2007)
Apsley Cherry-Garrard |
 | Grindhouse (2007)
(segment "Don't") (uncredited) |
 | Don't (2007)
Roddy McDowel |
 | The Wind in the Willows (2006)
Rat |
 | The League of Gentlemen Are Behind You (2006)
Hilary Briss / Mickey Michaels / Val Denton / Les McQueen / Lance Longthorne / Alvin Steele / Phil Proctor / Mrs Beasley / Mick McNamara / Neds / Lotte Lipp / Brian Morgan / Dr Chinnery / Iris Krell / Bobbin |
 | The League of Gentlemen Are Behind You! (2006)
|
 | Fear of Fanny (2006)
Johnnie Cradock |
 | Starter for 10 (2006)
Bamber Gascoigne |
 | Return of the Goodies (2005)
Himself |
 | Match Point (2005)
Ping-Pong Player |
 | Wallace & Gromit: The Curse of the Were-Rabbit (2005)
Miss Blight (voice) |
 | Don't Crash: The Documentary of the Making of the Movie of the Book of the Radio Series of 'The Hitchhiker's Guide to the Galaxy' (2005)
Self - The League of Gentlemen |
 | The League of Gentlemen's Apocalypse (2005)
Various Characters |
 | The Hitchhiker's Guide to the Galaxy (2005)
Additional Vogon Voices |
 | The Quatermass Experiment (2005)
John Paterson |
 | Doctor Who: A New Dimension (2005)
Self |
 | Agatha Christie: A Life in Pictures (2004)
Kenyon |
 | Global Conspiracy? (2004)
Terry Scanlon |
 | Spaced: Skip to the End (2004)
Self |
 | Shaun of the Dead (2004)
Radio Presenter With 'Spaceship' Theory / Wildlife voiceover (voice) (uncredited) |
 | Sex Lives of the Potato Men (2004)
Jeremy |
 | The Kneale Tapes (2003)
Self |
 | Bright Young Things (2003)
House Agent |
 | Robbie the Reindeer: Legend of the Lost Tribe (2002)
Viking (voice) |
 | Surrealissimo: The Trial of Salvador Dali (2002)
Louis Aragon |
| | The Cicerones (2002)
John Trant |
 | The League of Gentlemen: Live at Drury Lane (2001)
various |
 | Birthday Girl (2001)
Porter |
 | The League of Gentlemen - Yule Never Leave! (2000)
|
 | The Pitch of Fear (1999)
Mr. Borusa |
 | The Kidnappers (1999)
Mark |
 | The Web of Caves (1999)
The Doctor |
 | Stranger Than Fiction 3: Acting Up (1997)
|
 | Unnatural Selection (1996)
Mr. Emerson |
 | Bidding Adieu: A Video Diary (1996)
Self - Interviewer |
 | The Devil of Winterborne (1995)
Georgie |
 | Stranger than Fiction 2: From Script to Screen (1995)
|
 | The Zero Imperative (1994)
Dr. William Bruffin |
| | Highgate House of Horror
|
