Thunderbirds is a British science-fiction television series created by Gerry and Sylvia Anderson, filmed by their production company AP Films (APF) and distributed by ITC Entertainment. It was produced between 1964 and 1966 using a form of electronic marionette puppetry (dubbed "Supermarionation") combined with scale-model special effects sequences. Two series were filmed, comprising a total of thirty-two 50-minute episodes; production ceased following the completion of the second series' sixth episode when Lew Grade, the Andersons' financial backer, failed in his efforts to sell the programme to American network television.
Set in the mid-2060s, Thunderbirds is a follow-up to the earlier Supermarionation productions Four Feather Falls, Supercar, Fireball XL5 and Stingray. It follows the exploits of International Rescue (IR), a life-saving organisation equipped with technologically-advanced land, sea, air and space rescue craft; these are headed by a fleet of five vehicles named the Thunderbirds and launched from IR's secret base in the Pacific Ocean. The main characters are ex-astronaut Jeff Tracy, the founder of IR, and his five adult sons, who pilot the Thunderbird machines.