As part of a science experiment, a man has spent a record-breaking length of time alone down a hole, but an hour before he's due to re-emerge, something goes wrong and his colleagues have to go in to rescue him.
Director: Umberto Lenzi
Barbara Cupisti
Erna
Pietro Genuardi
Paul
Lorenzo Majnoni
Manfred
Giacomo Rossi Stuart
Dr. Johns
Gaetano Russo
Maurizio
Andrea Damiano
Laura
Mario Luzzi
Theo
Paul Müller
The Monk
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