dying world. Ace helps The Doctor get back to Perivale, also enabling Paterson, Derek and Shreela to flee the strange planet. The Doctor and Ace return to Perivale, where they find Midge and the Master have killed Paterson for sport. Midge too is killed in the Master's machinations. Karra's arrival brings comfort to Ace, whose transformation is continuing, but the Master kills Karra too. The Master transports the Doctor with him back to the Cheetah Planet for a final conflict but the Doctor resists the pull of the planet, turning away from violence, and is transported away from the dying world. However, the Master looks doomed on the planet as it begins to break up. The Doctor has gone back to the TARDIS and Earth, where he finds Ace, whose metamorphosis has reversed. Production Writing Writer Rona Munro approached script editor Andrew Cartmel at a BBC scriptwriting workshop and said that she'd "kill to write for Doctor Who." The story Munro developed incorporated themes including the morals of hunting (personified by the Cheetah People and signposted by Ace's friend Ange collecting for hunt saboteurs). The title Survival was chosen by Cartmel. Munro was disappointed by the realisation of the Cheetah People: Recording Survival was one of only a handful of Doctor Who serials to be recorded completely on BBC Outside Broadcast video, instead of the mix of OB and studio video that was more common during the late 1980s, and the mix of film and video that was usual before them. The other stories to be recorded solely on OB video were The Sontaran Experiment (1975), Delta and the Bannermen (1987), Silver Nemesis (1988) and The Curse of Fenric (1989). It was almost on the shooting days for the scenes on the planet of the Cheetah people. One of the extras removed her costume (revealing that she was wearing very little underneath) and simply walked off the set, causing delays while a replacement was found. The battle at the climax of the story was recorded and is set on the site of the ancient hill fort at Horsenden Hill, Perivale. The majority of location recording was done in and around Perivale, with small sections shot at nearby Ealing, outside and near The Drayton Court pub. The final Doctor Who episode in the original series Having already surmised that episode three of Survival was likely to at least be the last