While babysitting Commander Zero's son, Jonathan, Venus tells him story about when Fireball XL5 encountered a group of space pirates.
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