The story of the missions of the Supreme Headquarters of the Alien Defense Organization, which defends the Earth against extraterrestrial threats.
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Gerry AndersonDirector · (1 episode, 1970)
Cyril FrankelDirector · (2 episodes, 1971)
Sylvia AndersonWriter · teleplay by (1 episode, 1970)Gerry AndersonWriter · teleplay by (1 episode, 1970)Sylvia AndersonProducers · producer (uncredited) (1 episode, 1970)Gerry AndersonProducers · executive producer / producer (26 episodes, 1970–1971)
