| 2001 | Do You Have a Licence to Save this Planet? - Creature Design |
| 1986 | Doctor Who: The Ultimate Foe - Writer |
| 1986 | Doctor Who: The Mysterious Planet - Writer |
| 1985 | Doctor Who: The Two Doctors - Writer |
| 1984 | Doctor Who: The Caves of Androzani - Writer |
| 1981 | The Nightmare Man - Writer |
| 1981 | Fothergill - Writer |
| 1979 | Doctor Who: The Power of Kroll - Writer |
| 1978 | The Future - Writer |
| 1978 | Doctor Who: The Ribos Operation - Writer |
| 1977 | Doctor Who: The Sun Makers - Script Editor |
| 1977 | Doctor Who: The Sun Makers - Writer |
| 1977 | Doctor Who: Image of the Fendahl - Script Editor |
| 1977 | Doctor Who: The Invisible Enemy - Script Editor |
| 1977 | Doctor Who: Horror of Fang Rock - Script Editor |
| 1977 | Doctor Who: The Talons of Weng-Chiang - Script Editor |
| 1977 | Doctor Who: The Talons of Weng-Chiang - Writer |
| 1977 | Doctor Who: The Robots of Death - Script Editor |
| 1977 | Doctor Who: The Face of Evil - Script Editor |
| 1976 | Doctor Who: The Deadly Assassin - Script Editor |
| 1976 | Doctor Who: The Deadly Assassin - Writer |
| 1976 | Doctor Who: The Hand of Fear - Script Editor |
| 1976 | Doctor Who: The Masque of Mandragora - Script Editor |
| 1976 | Doctor Who: The Seeds of Doom - Script Editor |
| 1976 | Doctor Who: The Brain of Morbius - Script Editor |
| 1976 | Doctor Who: The Brain of Morbius - Writer |
| 1975 | Doctor Who: Pyramids of Mars - Script Editor |
| 1975 | Doctor Who: Pyramids of Mars - Writer |
| 1975 | Doctor Who: Planet of Evil - Script Editor |
| 1975 | Doctor Who: Terror of the Zygons - Script Editor |
| 1975 | Doctor Who: Revenge of the Cybermen - Script Editor |
| 1975 | Doctor Who: Revenge of the Cybermen - Writer |
| 1975 | Doctor Who: Genesis of the Daleks - Script Editor |
| 1975 | Doctor Who: The Sontaran Experiment - Script Editor |
| 1975 | Doctor Who: The Ark in Space - Script Editor |
| 1975 | Doctor Who: The Ark in Space - Writer |
| 1975 | Doctor Who: Robot - Script Editor |
| 1974 | Doctor Who: The Time Warrior - Writer |
| 1973 | Doctor Who: Carnival of Monsters - Writer |
| 1972 | Dead of Night: Return Flight - Writer |
| 1971 | Doctor Who: Terror of the Autons - Writer |
| 1970 | Doctor Who: Spearhead from Space - Writer |
| 1969 | Doctor Who: The Space Pirates - Writer |
| 1969 | Doctor Who: The Krotons - Writer |
| 1965 | Invasion - Story |
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