Sylvia Anderson first episode of a series then sharing the work according to their strengths. Gerry tended to specialise in special effects and hardware, and Sylvia in character, voices, costume, dialogue, and plotlines. In this way, Anderson contributed plot development and voice work for a series of half-hour shows including "Supercar", "Stingray" and "Fireball XL5". However, she felt the half-hour format was insufficient to fully develop characters and stories, and she persuaded the team's TV producer Lew Grade to extend their shows to a full hour. In the early 1960s, the Andersons co-created the series "Thunderbirds", and Sylvia created the characters. She
Gerry Anderson huge and dedicated international following that spans several generations. During the production of "Thunderbirds" the Andersons' marriage began to come under increasing strain, and the company also had a setback when the "Thunderbirds Are GO" feature film surprisingly flopped. In later interviews, Anderson said that he considered divorce, but this was halted when Sylvia announced that she was pregnant. Their son, Gerry Anderson Jr., was born in July 1967. By that time, production had started on a new series, "Captain Scarlet and the Mysterons" (1967), which saw the advent of more realistic marionette characters which, thanks to improvements in electronics