Filmography69 titles
| Year | Title | Character | Age at release |
|---|---|---|---|
| 2024 | Doctor Who at the PromsMovie | The Doctor (7) (archive footage) | 81 |
| 2024 | The Apocalypse BoxMovie | Peter Mann | 81 |
| 2021 | Doctor Who: 24 CaratMovie | The Doctor | 78 |
| 2020 | The Big Night InMovie | Self | 77 |
| 2020 | The OwnersMovie | Richard Huggins | 77 |
| 2020 | Lost at ChristmasMovie | Ernie | 77 |
| 2019 | The CircuitMovie | — | 76 |
| 2016 | The Real Marigold HotelSeries | Self | 73 |
| 2016 | Punk Strut: The MovieMovie | DJ | 73 |
| 2015 | Thunderbirds Are Go!Series | Aezethril the Wizard (voice) | 72 |
| 2014 | The Hobbit: The Battle of the Five ArmiesMovie | Radagast the Brown | 71 |
| 2014 | Doctor Who: The Ultimate Time Lord with Peter DavisonMovie | Self | 71 |
| 2013 | Father BrownSeries | Dr. Angus McClurgy | 70 |
| 2013 | Doctor Who Live: The AfterpartyMovie | Self | 70 |
| 2013 | The Hobbit: The Desolation of SmaugMovie | Radagast the Brown | 70 |
| 2013 | The Five(ish) Doctors RebootMovie | Self | 70 |
| 2013 | The Christmas CandleMovie | Edward Haddington | 70 |
| 2013 | Doctor Who at the PromsMovie | The Doctor (7) (archive footage) (uncredited) | 70 |
| 2012 | The Hobbit: An Unexpected JourneyMovie | Radagast the Brown | 69 |
| 2012 | The Inspector ChroniclesMovie | Uncle Roderick | 69 |
| 2012 | EldoradoMovie | General Zwick | 69 |
| 2011 | Pointless CelebritiesSeries | Self | 68 |
| 2011 | Doctor Who: Tales Lost in TimeMovie | — | 68 |
| 2010 | The Last Chance SaloonMovie | — | 67 |
| 2008 | King LearMovie | The Fool | 65 |
| 2007 | Davros ConnectionsMovie | (archival footage) | 64 |
| 2005 | Doctor Who ConfidentialSeries | — | 62 |
| 2005 | Doctor Who: A New DimensionMovie | Self | 62 |
| 2003 | The Story of Doctor WhoMovie | — | 60 |
| 2001 | Then & NowMovie | — | 58 |
| 2000 | The Mumbo JumboMovie | Mr. Tallman | 57 |
| 2000 | You: Story and Glory of a MasterpieceMovie | Museum attendant / Vasilij Grossman | 57 |
| 1999 | Adventures in Space and TimeMovie | Himself | 56 |
| 1998 | Where on Earth Is Katy Manning?Movie | — | 55 |
| 1997 | Space CadetsSeries | Self | 54 |
| 1997 | Beyond FearMovie | Michael Samms | 54 |
| 1996 | I Was a Doctor Who Monster!Movie | Presenter | 53 |
| 1996 | Doctor WhoMovie | The Doctor | 53 |
| 1994 | Stranger than FictionMovie | — | 51 |
| 1993 | Doctor Who: Dimensions in TimeMovie | The 7th Doctor | 50 |
| 1993 | GMTVSeries | Self | 50 |
| 1993 | Police 5: The MasterMovie | The Doctor (archive footage) | 50 |
| 1993 | The Airzone SolutionMovie | Anthony Stanwick | 50 |
| 1991 | Thrill Kill Video ClubMovie | Spoons | 48 |
| 1989 | Doctor Who: Ghost LightMovie | The Doctor | 46 |
| 1989 | Doctor Who: BattlefieldMovie | The Doctor | 46 |
| 1989 | Doctor Who: The Curse of FenricMovie | The Doctor | 46 |
| 1988 | Doctor Who: The Greatest Show in the GalaxyMovie | The Doctor | 45 |
| 1988 | Doctor Who: Remembrance of the DaleksMovie | The Doctor | 45 |
| 1988 | The LowdownSeries | — | 45 |
| 1987 | Three Kinds of HeatMovie | Harry Pimm | 44 |
| 1987 | Doctor Who: DragonfireMovie | The Doctor | 44 |
| 1987 | Going Live!Series | Self | 44 |
| 1987 | Doctor Who: Time and the RaniMovie | The Doctor | 44 |
| 1987 | Doctor Who: Paradise TowersMovie | The Doctor | 44 |
| 1987 | Doctor Who Then & NowSeries | Doctor Who | 44 |
| 1986 | CasualtySeries | Ashley Millington | 43 |
| 1985 | The Last Place on EarthSeries | Lt. 'Birdie' Bowers | 42 |
| 1984 | The BillSeries | — | 41 |
| 1983 | DramaramaSeries | Donald | 40 |
| 1980 | Electric in the CityMovie | Kerwin | 37 |
| 1979 | The Secret Policeman's BallMovie | Various Roles | 36 |
| 1979 | Turning Year TalesSeries | Turps | 36 |
| 1978 | An Audience with...Series | Self | 35 |
| 1974 | PlayhouseSeries | Kerwin | 31 |
| 1974 | TiswasSeries | — | 31 |
| 1971 | The Ken Campbell RoadshowMovie | Self | 28 |
| 1964 | Vision OnSeries | — | 21 |
| 1963 | Doctor WhoSeries | The Doctor | 20 |