Top Cast
Robert Clarke
John Lawrence
Margaret Field
Enid Elliot
Raymond Bond
Prof. Elliot
William Schallert
Dr. Mears
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Roy Engel
Tommy the Constable
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David Ormont
Inspector Porter
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Gilbert Fallman
Dr. Robert Blane
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Pat Goldin
The Man from Planet X
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Tom Daly
Donal, a searcher
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June Jeffery
Wife of Missing Man
