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 where he met cameraman Arthur Provis. After Polytechnic collapsed, Anderson, Provis, Reg Hill and John Read formed Pentagon Films in 1955. Pentagon was wound up soon after and Anderson and Provis formed a new company, AP Films, for Anderson-Provis Films, with Hill and Read as their partners. Anderson continued his freelance directing work to obtain funds to maintain the fledgling company. AP Films' first television venture was produced for Granada Television. Created by Roberta Leigh, "The Adventures of Twizzle" (1957–1958) was a series for young children about a doll with the ability to 'twizzle' his arms and legs to greater