mimed on set; Rogers intentionally moved in a stiff manner to emphasise that the character was a robotic exhibit. In the script, the Fungoids were described as "a black, glistening creature of sponge ... shaped like an egg"; Lambert asked Nation to change the shape so a human actor could fit inside. The name "Fungoid" was originally used for the Mire Beast. Peter Diamond choreographed the fight between the Doctor and his robotic counterpart in the fifth episode. Peter Purves, who Martin had rejected to cast as a Menoptra in The Web Planet, was cast in the role of Morton Dill. In the draft script, Morton was described as a "rather gawky young man... cast in the Hollywood mould of the southern hayseed come to the big city". After Purves's performance as Morton, Martin, Hartnell, and O'Brien told Lambert that they had enjoyed working with him, and recommended that he be considered to play the next companion. Martin was hesitant to cast Purves in two roles within the same serial, but Lambert approved. Spooner and Lambert took Purves to a pub and offered him the role of Michael Taylor. The following week, Purves discussed the character with Spooner; they changed his name to Steven Taylor and decided that he would be quirky and argumentative. Purves accepted the role within days. Though generally unfamiliar with science fiction, he recalled being impressed by the show's first serial, An Unearthly Child (1963), and had enjoyed working with Hartnell and O'Brien; he had met Hartnell a few weeks prior while shooting The World of Wooster (1965–1967) at Ealing Studios. On 21 May 1965, Purves was contracted for three stories (13 episodes), with an option for a further 20 episodes by 10 September and another 26 by 4 February 1966. Purves grew a beard for his role as Steven in the final episode of The Chase. Nation left the character's final actions ambiguous in the script, allowing Spooner to decide how to onboard him as a companion. His role as a companion on the show was announced on 18 June 1965. Filming While Martin was on leave in early March 1965, Lambert notified the design department that the serial would not utilise location filming; upon his return, however, Martin decided that minimal location shooting was desirable for a better representation of the Aridius surface in the first two episodes. Early 35mm film shooting took place