The crew of the XL5 becomes entranced by a strange alien sphere and Robert is the only one who can save the crew.
Alan Fennell
Writer
Alan Pattillo
Director
Eric Pask
Editor
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