Supermarionation a puppet hand, suspended by wires, operating the controls of "Thunderbird 1". The term "Supermarionation" was not coined until during production of later episodes of "Supercar". As a result, "Four Feather Falls" is often omitted from lists of Supermarionation productions. Two feature films based upon "Thunderbirds" were also made with Supermarionation: "Thunderbirds Are Go" (1966) and "Thunderbird 6" (1968). Numerous episodes of "Thunderbirds", "Captain Scarlet", and other series were also edited together (sometimes with the addition of new narration) to form movie-length features for VHS release and TV syndication in the 1980s. "The Secret Service" was actually a hybrid of
Supermarionation characters – played by puppets known as "revamps" – were sculpted in Plasticine. The term "Supermarionation" was coined during the production of APF's fourth series, "Supercar", whose final 13 episodes were the first to be credited as being "Filmed in Supermarionation". The system used marionettes suspended and controlled by thin wires. As the wires were visible to the camera, the puppeteers attempted to conceal them by spraying them with "antiflare" (grease mist) or painting them various colours so that they would blend in with the backgrounds. The marionettes' two distinguishing features were their fibreglass heads and the internal solenoids that