Sylvia Anderson
Lady Penelope Creighton-Ward
Ray Barrett
John Tracy / The Hood
Alexander Davion
Space Captain Greg Martin
Christine Finn
Tin-Tin Kyrano
David Graham
Gordon Tracy / Brains / Parker
Paul Maxwell
Captain Paul Travers
Neil McCallum
Dr. Ray Pierce
Bob Monkhouse
Space Navigator Brad Newman / Swinging Star Compere
Charles Bud Tingwell
Dr. Tony Grant / Angry Young Man / Public Relations Officer
Jeremy Wilkin
Virgil Tracy / Space Exploration Center President
Matt Zimmerman
Alan Tracy / Messenger
United Kingdom release: 12th December 1966
Ireland release: 17th March 1967
Japan release: 15th July 1967
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