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.
Verdict: Unknown
> Ernest B. Schoedsack (Director)
> Henry Sharp (Director of Photography)
> Hollingsworth Morse (Assistant Director)
> Malcolm Stuart Boylan (Screenplay)
> Tom Kilpatrick (Screenplay)
