The Fireball XL5 foils an attempted bombing while transporting the King of Platonia and is caught in the middle of the plot to assassinate the King and sent two planets into war.
David Elliott
Director
Alan Fennell
Writer
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