Four explorers are summoned to Peru by the brilliant physicist Dr Thorkel. They discover a rich source of radium and a half-mad Thorkel who shrinks them down to one-fifth their normal size when they threaten to stop his unorthodox experimentation
Thomas Coley | Bill Stockton | |
Janice Logan | Dr. Mary Robinson | |
Charles Halton | Dr. Rupert Bulfinch | |
Victor Kilian | Steve Baker | |
Frank Yaconelli | Pedro | |
Paul Fix | Dr. Mendoza |
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