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.
| Actor | Role |
|---|---|
 Barbara CupistiErna | Erna |
 Pietro GenuardiPaul | Paul |
 Lorenzo MajnoniManfred | Manfred |
 Giacomo Rossi StuartDr. Johns | Dr. Johns |
 Gaetano RussoMaurizio | Maurizio |
| AAndrea DamianoLaura | Laura |
| MMario LuzziTheo | Theo |
 Paul MüllerThe Monk | The Monk |
 Emanuele TurchiNot listed | Not listed |