The Dark Dimension ( TV story ) The Dark Dimension , written by fan scholar Adrian Rigelsford , was a planned film commissioned by BBC Enterprises that was to have been released in 1993 to commemorate the thirtieth anniversary of " Doctor Who " . Initial production . Cancellation . " The Dark Dimension " ( later known as " Lost in the Dark Dimension " ) ran into obstacles which prevented it from being produced . Some of the actors , particularly Jon Pertwee and Colin Baker , were not pleased that their roles were so small ( the script featured the Fourth Doctor prominently while the others had small scenes ) . The main cancellation of the project fell to a miscalculation in the cost of the program . A large sum of money had not been added to both the cost and revenue of the project — that of the cost of putting the show on the air . When the calculations were corrected , it became clear that it was no longer viable to produce the film financially . Attempts were made afterward to lighten the cost of the film by cutting key scenes and restructuring the film entirely - but these eventually fell through . Some minor elements of the scripts - such as characters not being able to be visible because of being in another level of time — were later used in the television story " Dimensions in Time " . The story . Far in the future of Earth , most humans have been wiped out . The Earth is left in ruins , the only people left on the planet being a resistance group which has been trying to hunt the creature that has done this to the planet . The group is searching an area , and their leader , Summerfield , suddenly finds a body . It is the Seventh Doctor — murdered by the creature . The Doctor is given a funeral which Summerfield finds fitting , as they are sent floating into sea and lit aflame . With the Doctor gone , Summerfield tells the others that they have to finish what the Doctor started on their own . The story would have centred on an older version of the Fourth Doctor , the Brigadier and Ace with shorter appearances by the other surviving Doctors , though in more minor roles . Classic monsters would have included the Cybermen , Dalek s , the Ice Warrior s and the Yeti . The central idea to the story was that of the alteration of time by an evil creature so that the Fourth Doctor would have died instead of regenerating after falling from the Pharos Project ( as seen in " Logopolis " ) . In doing so , the creature created a " Dark Dimension " . The Doctor had to revert back the timeline before he and his future incarnations were erased from time by the effect . The production would have also featured " Summerfield " , who would have been the Seventh Doctor ' s companion Bernice Summerfield from the New Adventures book series . Although , the character being owned by its creator Paul Cornell , BBC could not feature it without his permission . Furthermore Alistair Gordon Lethbridge - Stewart ' s son Alexander Stewart would have an appearance in the film . In the alternative timeline he would have been the boyfriend of Ace . The couple would have had several children . In the later restored timeline Alexander would have died in 1979 at the age of ten . Monsters . The villain of the story was a creature " Entirely made out of chronal energy " . In the beginning of the episode , the resistance group led by Summerfield would try to kill this creature by sending it into the time vortex , only for it to escape into the past , where it would possess Professor Hawkspur in 1936 and travel to the future to kill the Fourth Doctor on the Pharos Project . This story was to also feature almost all the classic monsters , with many of them being redesigned or feature totally new developments of the original design . In the original script , the story introduced a new type of Cyberman , the Cybercommander . The Daleks also were to have featured a redesign featuring a one - off new special weapons Dalek by BBC Workshop under Tony Harding supervison . A design of this " Special Weapons Dalek " was passed by BBC visual FX assistant Alan Marshall . Production . Graeme Harper was scheduled to direct the story . Further development . Adrian Rigelsford wrote a book entitled " The Making of the Dark Dimension " which contained scripts and concept drawings . However , it repeatedly ran into release problems and has never been published . " The Dark Dimension " and its production were briefly mentioned in Rigelsford ' s own " " .