2026Bunker
2025Marvel Studios' The Fantastic Four: First Steps - World Premiere— Ted Gilbert (archive footage) (uncredited)
2025Being Stanley Baxter— Self
2024National Theatre Live: The Motive and the Cue— Sir John Gielgud
2024Inside No. 9: The Party's Over— Self
2023Hammer A.D. 2023— Self
2023The Hound of the Baskervilles— Sherlock Holmes
2023Mission: Impossible - Ölümcül Hesaplaşma Birinci Bölüm— NSA
2022A Christmas Carol: A Ghost Story— Jacob Marley
2022Peter Davison: Uncut!— Self
2022Mincemeat Operasyonu— Ivor Montazac
2022The Road Dance— Doctor MacLean
2021Memento Mori— Henry Huxley
2021A Silent Imprisonment— Mr Murphy
2021The Amazing Mr. Blunden— Mr. Wickens
2021Akıllı Soygun— Donald
2021The Sparks Brothers— Self
2020Tales of the Uncanny— Self
2020Baba— The Man
2020In Search of Dracula— Himself - Presenter
2020Scandal & Beauty: Mark Gatiss on Aubrey Beardsley— Self
2020Cold War Steve Meets the Outside World— Self
2019Brexit The Uncivil War— Peter Mandelson (voice)
2019Doctor Who and the Third Man— Himself
2018The Dead Room— Radio Announcer (voice)
2018Sarayın Gözdesi— Lord Marlborough
2018Christopher Robin— Giles Winslow
2018Merhamet— Ronald Hall
2018National Theatre Live: The Madness of George III— George III
2018Mark Gatiss on John Minton: The Lost Man of British Art— Himself - Presenter
2017Against the Law— Dr. Landers
2017Doctor Who: Twice Upon a Time— The Captain
2017Mars: a Traveller's Guide— Narrator
2016Babamın Ordusu— Colonel Theakes
2016Sherlock: The Abominable Bride— Mycroft Holmes
2016Hain— Billy Matlock
2016Denial— Professor Robert Jan van Pelt
2016Absolutely Fabulous Filmi— Joel
2016Mark Gatiss: A Study in Sherlock— Himself
2015Victor Frankenstein— Dettweiler
2015Coalition— Peter Mandelson
2015The Vote— Steven Crosswell
2015Premium Bond with Mark Gatiss and Matthew Sweet— Himself
2015Release the Hound!— Self
2014Unlocking Sherlock— Himself / Mark Gatiss
2014National Theatre Live: Coriolanus— Menenius Agrippa
201450 Years of BBC Two Comedy— Self
2014How to Be Sherlock Holmes: The Many Faces of a Master Detective— Self
2013M.R. James: Ghost Writer— Presenter
2013Doctor Who Live: The Next Doctor— Self
2013The Celestial Toyroom
2012Doctor Who: The Great Detective— Narrator
2012Horror Europa with Mark Gatiss— Self - Host
2012The Real Sherlock Holmes— Self
2012Back to Black: The Making of Dracula Prince of Darkness— Self - Actor and Writer
2011Cleaning Up— Mr Jackson
2010The First Men in the Moon— Cavor
2010Unlocking Sherlock— Himself
2009Ghosts in the Machine— Himself
2009Spanish Flu: The Forgotten Fallen— Ernest Dunks
2009New Town— Duff Purves
2007Consenting Adults— PC Butcher
2007The Worst Journey in the World— Apsley Cherry-Garrard
2006The League of Gentlemen Are Behind You— 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
2006The Wind in the Willows— Rat
2006Üniversiteler Yarışıyor— Bamber Gascoigne
2006Fear of Fanny— Johnnie Cradock
2005Wallace ve Gromit Yaramaz Tavşana Karşı— Miss Blight (voice)
2005The Quatermass Experiment— John Paterson
2005Centilmenlerin Kıyamet Günü— Various Characters
2005Doctor Who: A New Dimension— Self
2005Bir Otostopçunun Galaksi Rehberi— Additional Vogon Voices
2005Return of the Goodies— Himself
2005Don'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'— Self - The League of Gentlemen
2005Bring Something Back: The Making of 'The Quatermass Experiment'
2004Agatha Christie: A Life in Pictures— Kenyon
2004Spaced: Skip to the End— Self
2004Sex Lives of the Potato Men— Jeremy
2004Zombilerin Şafağı— Radio Presenter With 'Spaceship' Theory / Wildlife voiceover (voice) (uncredited)
2004Global Conspiracy?— Terry Scanlon
2003The Kneale Tapes— Self
2003Bright Young Things— House Agent
2002The Cicerones— John Trant
2002Robbie the Reindeer: Legend of the Lost Tribe— Viking (voice)
2002Surrealissimo: The Trial of Salvador Dali— Louis Aragon
2002Tales from Behind the Crypt— Self
2001Yaşgünü Kızı— Porter
2001The League of Gentlemen: Live at Drury Lane— various
1999The Web of Caves— The Doctor
1999The Kidnappers— Mark
1999The Pitch of Fear— Mr. Borusa
1997Stranger Than Fiction 3: Acting Up
1996PROBE: Unnatural Selection— Mr. Emerson
1996Bidding Adieu: A Video Diary— Self - Interviewer
1995Stranger than Fiction 2: From Script to Screen
1995Highgate House of Horror— Mr Banham
1995PROBE: The Devil of Winterborne— Georgie
1994PROBE: The Zero Imperative— Dr. William Bruffin
—The Painting & The Statue— Old Lord/Butler 'Smith'/Dancing Man/Old Lord 'Johnny'
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