are evident in the final programmes. This was also the first and only Doctor Who story where there were no interior scenes at all. During shooting, Baker broke his collarbone. However, because part of his costume was a large scarf, he could conceal the neck brace he had to wear following the injury. For action scenes, he was doubled by regular stunt performer Terry Walsh, shot from several face-concealing angles. The filming of both episodes was completed in a week. Cast notes Glyn Jones, who played the astronaut Krans, wrote the First Doctor serial The Space Museum (1965); he was the only person both to act and write for Doctor Who during its original 1963-89 run. The Sontaran Experiment contains the last major role played by Kevin Lindsay before his death in 1975 of a heart condition. He found the heavy Sontaran costume so difficult to manage that he could not leave the Hound Tor location for breaks, and also could not perform the fight scene – a stand-in, Stuart Fell, was used instead. Terry Walsh not only played a minor role as an astronaut, but doubled for Tom Baker in parts of episode two, after Baker broke a collarbone during filming. This meant that the climactic fight was performed by two stand-ins rather than the original actors. Most of the actors playing the GalSec astronauts were South African. This was specified in the casting, as the writers, Bob Baker and Dave Martin, were interested in language change and reasoned that the multi-linguistic influences on South African English might resemble future developments of the English language. Broadcast and reception The two episodes were combined into a single 50 minute omnibus broadcast on BBC1 at 6:25 pm on 9 July 1976 and was seen by 8.2 million viewers. The story received criticism from Mary Whitehouse (of the National Viewers' and Listeners' Association) for its depiction of "helpless adults in a state of terror". Paul Cornell, Martin Day, and Keith Topping wrote in The Discontinuity Guide (1995) that the serial "succeeds despite its obvious limitations". They praised the look of the all-video location recording, but commented that "neither the robot nor the deflection of the Marshal's invasion plans are wholly convincing". In The Television Companion (1998), David J. Howe and Stephen James Walker said that the premise of a Sontaran surveying humans before conquering the Earth was "silly", but they praised the