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.
No streaming info available.
Verdict: Unknown
> Umberto Lenzi (Director)
> Sandro Mancori (Director of Photography)
> Olga Pehar (Screenplay)
> Umberto Lenzi (Story)
> Umberto Lenzi (Writer)
