short of content and reduced to five at the last minute. Producer Peter Bryant ordered Haisman and Lincoln to abandon writing the sixth episode and script editor Derrick Sherwin rewrote the fifth episode to provide a conclusion. Haisman and Lincoln were not informed of this, or of the BBC's merchandising of the Quarks, which led to their refusal to write for the series again. Subsequently, an additional episode had to be penned for the following The Mind Robber, also making that story five parts. Wrotham Quarry in Addington, Kent doubles as the planet surface of Dulkis. Patrick Troughton was absent from all of the location filming sessions. A double plays the role of the Doctor in all the location footage, his face being clearly visible in some shots. Cast notes Ronald Allen later played Ralph Cornish in The Ambassadors of Death (1970). Arthur Cox went on to play Mr Henderson in the 2010 episode "The Eleventh Hour". Brian Cant had previously played Kert Gantry in the story The Daleks' Master Plan (1965–66). Malcolm Terris later appeared in The Horns of Nimon (1979–80). Philip Voss had previously played Acomat in Marco Polo (1964). Broadcast and reception The BBC Audience Research Report for The Dominators showed that much of the sample dismissed the serial as unsurprising as it followed a known pattern, though a third felt that it was still inventive. In The Discontinuity Guide (1995), Paul Cornell, Martin Day, and Keith Topping wrote that the serial treated the issues of the time—like hippies and unilateralism—with "disdain", and the story was also "very dull". In The Television Companion (1998), David J. Howe and Stephen James Walker called the serial "a disappointingly lacklustre start to the sixth season". They found it hard for the viewer to care about the Dulcians, but said the Dominators were "hardly amongst the best of the series' alien creations, [but] at least quite well realised on screen". In 2009, Mark Braxton of Radio Times described the serial as lazy in production with "hopeless" cliffhangers and a lack of audience identification. He wrote that the few small "saving graces" were the appearance of the Quarks and the pyrotechnics. Reviewing the serial for SFX, Ian Berriman gave The Dominators a rating of two out of five stars. He wrote that the plot did not have much and was "push-button and pedestrian", with the best thing being Troughton. DVD Talk's John