| Movie | 2014 | Shadows of a Stranger | William Fallon | |
| Movie | 1997 | Stranger Than Fiction 3: Acting Up | | |
| Movie | 2013 | Doctor Who Live: The Afterparty | Self | |
| Movie | 2000 | TravelWise | Jonathan Pike | |
| Movie | 2015 | A Dozen Summers | The Narrator | |
| Movie | 1999 | The Waiting Time | Giles Fleming | |
| Movie | 2014 | Doctor Who: The Ultimate Time Lord with Peter Davison | Self | |
| Movie | 2021 | You Might Get Lost | Conrad | |
| Movie | 2023 | Secrets of a Wallaby Boy | Bruce (voice) | |
| Movie | 2023 | Buckle Up | Nick | |
| Movie | 1993 | The Airzone Solution | Arnold Davies | |
| Movie | 1999 | Soul's Ark | Galico | |
| Movie | 1993 | Doctor Who: Dimensions in Time | The 6th Doctor | |
| Movie | 2013 | The Five(ish) Doctors Reboot | Self | |
| Movie | 2023 | Talking Doctor Who | Self / The Doctor (6) (archive footage) | |
| Movie | 1986 | Who's Who | | |
| Movie | 1990 | Myth Makers 19: Colin Baker | | |
| Movie | 2001 | The Home Whovian | | |
| Movie | 2023 | Doctor Who: 60 Years of Secrets & Scandals | Self - archive | |
| Movie | 1975 | Drive Carefully, Darling | Brain | |
| Movie | 2013 | Doctor Who: The Day of the Doctor | The Doctor (6) (archive footage) | |
| Movie | 2019 | Doctor Who: The Trial | Self | |
| Movie | 2022 | The Caller | DS Rawlins (voice) | |
| Movie | 1990 | The PanoptiCon Tapes III | | |
| Movie | 1991 | The PanoptiCon Tapes Vol 1 - The Main Event | | |
| Movie | 1990 | The PanoptiCon Tapes II | | |
| Movie | 1986 | The PanoptiCon Tapes VI | | |
| Movie | 1990 | The PanoptiCon Tapes IV | | |
| Movie | 1990 | The PanoptiCon Tapes V | | |
| Movie | 1994 | Doctor Who: The Colin Baker Years | Self - Presenter | |
| Movie | 1994 | The Zero Imperative | Peter Russell | |
| Movie | 2018 | Remembering Deborah Watling | Self | |
| Movie | 2023 | Christmas at the Holly Day Inn | Ben | |
| Movie | 2019 | The Doctors: The Colin Baker Years | | |
| Movie | 1984 | Doctor Who: The Caves of Androzani | Sixth Doctor | |
| Movie | 2014 | Doctor Who: The Ultimate Companion | Self / The Doctor (archive footage) | |
| Movie | 1985 | Doctor Who: Vengeance on Varos | The Doctor | |
| Movie | 1992 | Doctor Who: Cybermen - The Early Years | Self - Host | |
| Movie | 1999 | The Harpist | | |
| Movie | 2005 | Doctor Who: A New Dimension | Self | |
| Movie | 2000 | The Asylum | Arbuthnot | |
| Movie | 2015 | A Christmas Carol | Charles Dickens | |
| Movie | 1972 | The Moonstone | John Herncastle | |
| Movie | 1985 | Doctor Who: Timelash | The Doctor | |
| Movie | 1984 | Doctor Who: The Twin Dilemma | The Doctor | |
| Movie | 1985 | Doctor Who: Attack of the Cybermen | The Doctor | |
| Movie | 1985 | Doctor Who: Revelation of the Daleks | The Doctor | |
| Movie | 1986 | Doctor Who: The Ultimate Foe | The Doctor | |
| Movie | 1986 | Doctor Who: The Mysterious Planet | The Doctor | |
| Movie | 1986 | Doctor Who: Mindwarp | The Doctor | |
| Movie | 1985 | Doctor Who: The Two Doctors | The Doctor | |
| Movie | 1986 | Doctor Who: Terror of the Vervoids | The Doctor | |
| Movie | 1985 | Doctor Who: The Mark of the Rani | The Doctor | |
| Movie | 1981 | Dangerous Davies: The Last Detective | William Lind | |
| Movie | 1993 | The Stranger: In Memory Alone | The Stranger | |
| Movie | 1994 | The Stranger: The Terror Game | The Stranger / Soloman | |
| Movie | 1992 | The Stranger: More Than a Messiah | The Stranger | |
| Movie | 1994 | The Stranger: Breach of the Peace | The Stranger / Soloman | |
| Movie | 1995 | The Stranger: Eye of the Beholder | The Stranger / Soloman | |
| Movie | 1991 | The Stranger: Summoned by Shadows | The Stranger | |
| Movie | 1994 | Stranger than Fiction | | |
| Movie | 1995 | Stranger than Fiction 2: From Script to Screen | | |
| Movie | 1995 | The Doctors: 30 Years of Time Travel and Beyond | | |
| Movie | 1999 | The Adventures of Young Indiana Jones: Daredevils of the Desert | Chauvel | |
| Movie | 1993 | 30 Years in the TARDIS | Himself | |
| Movie | 1999 | Adventures in Space and Time | Himself | |
| Movie | 2008 | Celebration: Doctor Who in 1983 | | |
| Movie | 2007 | Davros Connections | (archival audio) | |
| Movie | 2006 | Built for War: The Sontaran Story | | |
| Movie | 2003 | The Story of Doctor Who | | |
| Movie | 1999 | Carnival of Monsters | | |
| Movie | 2019 | Showman: The Life of John Nathan-Turner | Himself | |
| Movie | 2019 | The Doctor Who Cookbook Revisited | Self | |
| Movie | 2013 | Doctor Who Live: The Next Doctor | Self | |
| Movie | 2008 | Trials and Tribulations | | |
| Movie | 2008 | The Making of The Trial of a Time Lord | | |
| Movie | 2016 | Last Man on Earth | Professor James Friedkin | |
| Movie | 1983 | Doctor Who: Arc of Infinity | Commander Maxil | |
| Movie | 2021 | The Ghosts of Borley Rectory | Charles Sutton | |
| Movie | 2002 | Doctor Who: Real Time | The Doctor | |
| Movie | 2024 | Doctor Who at the Proms | The Doctor (6) (archive footage) | |
| Movie | 2008 | Doctor Who: The Next Doctor | The Doctor (6) (archive footage) | |
| Movie | 2015 | Doctor Who: The Husbands of River Song | The Doctor (6) (picture) (uncredited) | |
| Movie | 1993 | Bigger Inside Than Out | Narrator | |
| Movie | 1985 | A Fix with Sontarans | The Doctor | |
| Movie | 2008 | The Ties That Bind Us | The Sixth Doctor / Commander Maxil (archive footage) | |
| Movie | 2013 | Doctor Who: Tales from the TARDIS | Self | |
| Movie | 2025 | Doctor Who: Wish World & The Reality War | The Doctor (archive footage) (uncredited) | |
| Movie | 2017 | Classic Doctor Who Comic-Con Panel | Self | |
| Movie | 2008 | Now, Get Out of That | | |
| TV Show | 1963 | Doctor Who | Commander Maxil | 3 |
| TV Show | 2005 | Doctor Who Confidential | | 10 |
| TV Show | 1997 | Jonathan Creek | Hedley Shale | 1 |
| TV Show | 1978 | Blake's 7 | Bayban | 1 |
| TV Show | 1972 | War & Peace | Anatole Kuragin | 3 |
| TV Show | 2004 | Hustle | Phil | 1 |
| TV Show | 1982 | Countdown | | 6 |
| TV Show | 1975 | Jim'll Fix It | Doctor Who | 1 |
| TV Show | 1994 | The Knock | | 1 |
| TV Show | 1974 | Fall of Eagles | Crown Prince Willie | 1 |
| TV Show | 1973 | Orson Welles' Great Mysteries | George Barclay | 1 |
| TV Show | 1972 | The Brothers | | 92 |
| TV Show | 1991 | Pebble Mill | Self | 1 |
| TV Show | 1974 | The Carnforth Practice | | 1 |
| TV Show | 1991 | The Stranger | | 8 |
| TV Show | 1993 | GMTV | Self | 1 |
| TV Show | 2011 | Pointless Celebrities | Self | 1 |
| TV Show | 1999 | Sunburn | John Buchanan | 1 |
| TV Show | 1984 | Swallows and Amazons Forever! | Dr. Dudgeon | 8 |
| TV Show | 1969 | The Mind of Mr. J.G. Reeder | Reigate | 1 |
| TV Show | 2007 | Kingdom | Mr. Dodds | 1 |
| TV Show | 1986 | Casualty | Colin Miles | 1 |
| TV Show | 1986 | Casualty | David Vincent | 1 |
| TV Show | 2023 | Tales of the Tardis | The Doctor | 1 |
| TV Show | 1982 | Wogan | Self | 1 |
| TV Show | 1997 | A Dance to the Music of Time | Canon Fenneau | 4 |
| TV Show | 1971 | Cousin Bette | Count Wenceslas Steinbock | 5 |
| TV Show | 1985 | Doctor Who's Who's Who | Doctor Who | 1 |
| TV Show | 1965 | Public Eye | Town Hall Clerk | 1 |
| TV Show | 2011 | Celebrity Antiques Road Trip | Self - Participant | 1 |
| TV Show | 1970 | The Roads to Freedom | Claude | 13 |
| TV Show | 1963 | Doctor Who | The Doctor | 30 |
| TV Show | 2013 | Doctor Who: The Doctors Revisited | Self | 11 |
| TV Show | 2002 | Doctor Who: Real Time | The Doctor | 6 |
| TV Show | 2002 | I'm a Celebrity...Get Me Out of Here! | Self | 13 |
| TV Show | 1972 | The Edwardians | Joseph Laycock | 1 |
| TV Show | 2012 | BBC Comedy Feeds | | 1 |
