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
Thunderbirds (TV series) considered the Andersons' most popular series and their greatest critical and commercial success. In 1966, the show received a Royal Television Society Silver Medal for Outstanding Artistic Achievement and Gerry Anderson received an honorary fellowship of the British Kinematograph, Sound and Television Society. In 2007, "Thunderbirds" achieved 19th place in a "Radio Times" magazine reader poll to determine the best science-fiction TV programme of all time. It is ranked fourth by the 2013 Channel 5 list show "50 Greatest Kids' TV Shows". For Peel, "Thunderbirds" is "without a doubt the peak of the Supermarionation achievement". Suggesting that the series is