| 2025 | The Fantastic Four: First Steps | Ted Gilbert | ★ 0.0 |
| 2025 | Mission: Impossible - The final Reckoning | NSA | ★ 0.0 |
| 2024 | Inside No. 9: The Party's Over | Self | ★ 10.0 |
| 2024 | National Theatre Live: The Motive and the Cue | Sir John Gielgud | ★ 7.5 |
| 2023 | The Hound of the Baskervilles | Sherlock Holmes | ★ 8.0 |
| 2023 | Hammer A.D. 2023 | Self | ★ 7.5 |
| 2023 | Mission: Impossible - Dead Reckoning Teil Eins | NSA | ★ 7.5 |
| 2022 | A Christmas Carol: A Ghost Story | Jacob Marley | ★ 8.5 |
| 2022 | Peter Davison: Uncut! | Self | ★ 0.0 |
| 2022 | The Road Dance - Dunkle Liebe | Doctor MacLean | ★ 6.8 |
| 2022 | Die Täuschung | Ivor Montazac | ★ 6.5 |
| 2021 | Der fabelhafte Mr. Blunden | Mr. Wickens | ★ 6.2 |
| 2021 | Memento Mori | Henry Huxley | ★ 0.0 |
| 2021 | The Sparks Brothers | Self | ★ 7.4 |
| 2021 | A Silent Imprisonment | Mr Murphy | ★ 0.0 |
| 2021 | Locked Down | Donald | ★ 5.2 |
| 2020 | The Father | The Man | ★ 8.1 |
| 2020 | Cold War Steve Meets the Outside World | Self | ★ 0.0 |
| 2020 | Tales of the Uncanny | Self | ★ 7.1 |
| 2020 | Scandal & Beauty: Mark Gatiss on Aubrey Beardsley | Himself | ★ 0.0 |
| 2020 | In Search of Dracula | Himself - Presenter | ★ 9.0 |
| 2019 | Doctor Who and the Third Man | Himself | ★ 0.0 |
| 2019 | Brexit – The Uncivil War | Peter Mandelson (voice) | ★ 6.6 |
| 2018 | The Dead Room | Radio Announcer (voice) | ★ 5.7 |
| 2018 | The Favourite - Intrigen und Irrsinn | Lord Marlborough | ★ 7.5 |
| 2018 | National Theatre Live: The Madness of George III | George III | ★ 6.3 |
| 2018 | The League of Gentlemen - Live Again! | Various Characters | ★ 9.5 |
| 2018 | The League of Gentlemen - Live Again! | Various Characters | ★ 0.0 |
| 2018 | Mark Gatiss on John Minton: The Lost Man of British Art | Himself - Presenter | ★ 0.0 |
| 2018 | Christopher Robin | Giles Winslow | ★ 7.3 |
| 2018 | Vor uns das Meer | Ronald Hall | ★ 6.0 |
| 2017 | Doctor Who: Aus der Zeit gefallen | The Captain | ★ 8.0 |
| 2017 | Der Mars – Reiseführer zum Roten Planeten | Narrator | ★ 8.0 |
| 2017 | Against the Law | Dr. Landers | ★ 7.0 |
| 2016 | Verleugnung | Professor Robert Jan van der Pelt | ★ 6.9 |
| 2016 | Absolutely Fabulous: Der Film | Joel | ★ 5.3 |
| 2016 | Verräter wie wir | Billy Matlock | ★ 6.0 |
| 2016 | Dad's Army | Colonel Theakes | ★ 5.0 |
| 2016 | Mark Gatiss: A Study in Sherlock | Himself | ★ 7.3 |
| 2016 | Sherlock - Die Braut des Grauens | Mycroft Holmes | ★ 7.8 |
| 2015 | Victor Frankenstein - Genie und Wahnsinn | Dettweiler | ★ 5.9 |
| 2015 | Premium Bond with Mark Gatiss and Matthew Sweet | Himself | ★ 8.0 |
| 2015 | The Vote | Steven Crosswell | ★ 8.4 |
| 2015 | Release the Hound! | Self | ★ 0.0 |
| 2015 | Coalition | Peter Mandelson | ★ 7.0 |
| 2014 | 50 Years of BBC Two Comedy | Self | ★ 8.0 |
| 2014 | National Theatre Live: Coriolanus | Menenius Agrippa | ★ 8.4 |
| 2014 | Unlocking Sherlock | Himself / Mark Gatiss | ★ 7.8 |
| 2014 | How to Be Sherlock Holmes: The Many Faces of a Master Detective | Self | ★ 0.0 |
| 2013 | M.R. James: Ghost Writer | Presenter | ★ 8.7 |
| 2013 | Doctor Who Live: The Next Doctor | Self | ★ 5.0 |
| 2013 | The Celestial Toyroom | | ★ 0.0 |
| 2012 | Doctor Who: The Great Detective | Narrator | ★ 8.5 |
| 2012 | Horror Europa with Mark Gatiss | Self - Host | ★ 8.0 |
| 2012 | The Real Sherlock Holmes | Self | ★ 4.0 |
| 2012 | Back to Black: The Making of Dracula Prince of Darkness | Self - Actor and Writer | ★ 8.0 |
| 2011 | Cleaning Up | Mr Jackson | ★ 9.0 |
| 2010 | The First Men in the Moon | Cavor | ★ 5.6 |
| 2010 | Unlocking Sherlock | Himself | ★ 6.5 |
| 2010 | Worried About the Boy | Malcolm McLaren | ★ 6.4 |
| 2009 | Ghosts in the Machine | Himself | ★ 0.0 |
| 2009 | Spanish Flu: The Forgotten Fallen | Ernest Dunks | ★ 7.3 |
| 2009 | New Town | Duff Purves | ★ 0.0 |
| 2007 | Consenting Adults | PC Butcher | ★ 5.7 |
| 2007 | The Worst Journey in the World | Apsley Cherry-Garrard | ★ 6.5 |
| 2007 | Grindhouse | (segment "Don't") (uncredited) | ★ 7.0 |
| 2006 | The Wind in the Willows | Rat | ★ 6.4 |
| 2006 | The 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 | ★ 7.6 |
| 2006 | The League of Gentlemen Are Behind You! | | ★ 8.2 |
| 2006 | Fear of Fanny | Johnnie Cradock | ★ 7.3 |
| 2006 | Starter for 10 | Bamber Gascoigne | ★ 6.4 |
| 2005 | Return of the Goodies | Himself | ★ 6.9 |
| 2005 | Match Point | Ping-Pong Player | ★ 7.4 |
| 2005 | Bring Something Back: The Making of 'The Quatermass Experiment' | | ★ 0.0 |
| 2005 | Wallace & Gromit - Auf der Jagd nach dem Riesenkaninchen | Miss Blight (voice) | ★ 7.1 |
| 2005 | 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' | Self - The League of Gentlemen | ★ 0.0 |
| 2005 | The League of the Gentlemen's Apocalypse | Various Characters | ★ 6.3 |
| 2005 | Per Anhalter durch die Galaxis | Additional Vogon Voices | ★ 6.7 |
| 2005 | The Quatermass Experiment | John Paterson | ★ 5.6 |
| 2005 | Doctor Who: A New Dimension | Self | ★ 0.0 |
| 2004 | Agatha Christie: A Life in Pictures | Kenyon | ★ 8.1 |
| 2004 | Global Conspiracy? | Terry Scanlon | ★ 0.0 |
| 2004 | Spaced: Skip to the End | Self | ★ 6.1 |
| 2004 | Shaun of the Dead | Radio Presenter With 'Spaceship' Theory / Wildlife voiceover (voice) (uncredited) | ★ 7.5 |
| 2004 | Sex Lives of the Potato Men | Jeremy | ★ 4.5 |
| 2003 | The Kneale Tapes | Self | ★ 0.0 |
| 2003 | Bright Young Things | House Agent | ★ 6.3 |
| 2002 | Robbie, das Rentier in Die Legende des vergessenen Stammes | Viking (voice) | ★ 5.3 |
| 2002 | Surrealissimo: The Trial of Salvador Dali | Louis Aragon | ★ 5.8 |
| 2002 | The Cicerones | John Trant | ★ 5.2 |
| 2001 | The League of Gentlemen: Live at Drury Lane | various | ★ 7.9 |
| 2001 | Birthday Girl | Porter | ★ 5.9 |
| 2000 | The League of Gentlemen - Yule Never Leave! | | ★ 9.0 |
| 1999 | The Kidnappers | Mark | ★ 0.0 |
| 1999 | The Pitch of Fear | Mr. Borusa | ★ 0.0 |
| 1999 | The Web of Caves | The Doctor | ★ 0.0 |
| 1997 | Stranger Than Fiction 3: Acting Up | | ★ 0.0 |
| 1996 | Unnatural Selection | Mr. Emerson | ★ 6.8 |
| 1996 | Bidding Adieu: A Video Diary | Self - Interviewer | ★ 6.0 |
| 1995 | The Devil of Winterborne | Georgie | ★ 8.8 |
| 1995 | Stranger than Fiction 2: From Script to Screen | | ★ 0.0 |
| 1995 | Highgate House of Horror | Mr Banham | ★ 8.0 |
| 1994 | The Zero Imperative | Dr. William Bruffin | ★ 7.0 |
