The inhabitants of Ganymede need to find mates from another world or they will become extinct. They soon discover a suitable breeding stock amongst the females of planet Earth.
Patricia Haines | Ann Barlow | |
Alfred Burke | Detective Supt. Hartley | |
John Carson | The Major | |
Maurice Denham | Dr. Morley | |
Robert Crewdson | Medra | |
Jack Watson | The Sergeant |
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