Gerry Anderson Associated Television (ATV) boss who offered to buy the show. This began a long friendship and a very successful professional association between the two men. The new series, "Supercar", (1960–61) was developed by Gerry & Sylvia Anderson and Reg Hill based on a story written by Sylvia Anderson and marked several important advances for APF. Sylvia Anderson took on a larger role and became a partner in the company. The series was also the official debut of Supermarionation, the electronic system that made the marionettes more lifelike and convincing on screen. The system used the audio signal from pre-recorded tapes
UFO (TV series) positions, so the occasional disappearance of characters—some of whom would later return in other positions—fits in with the concept of the series. Also, owing to the scheduling of the series not reflecting the production order, some episodes featuring departed cast members were not broadcast until late in the series, which can give the impression that no major cast changes occurred. Only Ed Bishop appeared in every episode. One of the female Moonbase operatives, Joanna, was played by Shakira Baksh, who later married actor Michael Caine. Producer Gerry Anderson later said that he had lost his temper with her so badly