Documentary telling the story of enduring 1960s children's animated marionette show, Thunderbirds. Creator Gerry Anderson, as well as cast, crew and fans, reveal how space travel and new technology promised an exciting future, as Thunderbirds captured the spirit of the age. There's a look at how Gerry's team created futuristic special effects from their humble studios in Slough and why the show was axed after just 32 episodes. Contributors include the voice of Lady Penelope, Sylvia Anderson.