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 successful in both the UK and America and its theme song "Avenues and Alleyways" became a hit record in the UK for singer Tony Christie. It was also the first live-action series produced by Anderson to survive to a second season. Following "The Protectors", Anderson worked on several new projects, none of which he was able to take into production. A proposed second series of "UFO" was not undertaken, and a return to marionettes in the television pilot for a series called "The Investigator" failed to find a buyer. Elements of the abandoned second series of "UFO" were eventually turned