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
Sylvia Anderson in 1968, Turner commented: "we wanted a glamorous blonde and [Anderson] was the obvious choice." In 1966 and 1968, Anderson produced two feature-length films based on the "Thunderbirds" story, "Thunderbirds Are Go" and "Thunderbird 6". She was co-creator with Gerry Anderson for the series "UFO" (1969-1970) on which she co-produced, was responsible for fashions on the show, and did the majority of the casting. The Andersons' creative partnership ended when their marriage broke down during the production of the of "" in 1975. Gerry announced his intention to separate on the evening of the wrap party, following which Sylvia ceased