After a blackout at Space City, a missile gets through the radar blackout, and is heading towards Space City with a dangerous cargo...
John Kelly
Director
Gerry Anderson
Robert the Robot (voice) (uncredited)
David Graham
Lieutenant Ninety (voice)
Sylvia Anderson
Doctor Venus (voice)
Paul Maxwell
Colonel Steve Zodiac (voice)
John Bluthal
Commander Wilbur Zero (voice)
Guest Star