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 has to go in to rescue him.
Directed byUmberto Lenzi
Written byUmberto Lenzi (story), Olga Pehar (screenplay)
CountryItaly
Runtime90 min
On screen
Barbara Cupisti
Pietro Genuardi
Lorenzo Majnoni
Giacomo Rossi Stuart