Astronauts become monstrous host-inhabiting creatures after space mission. Cave explorers encounter these beings underground. Survivors try escaping and fighting the threat.Astronauts become monstrous host-inhabiting creatures after space mission. Cave explorers encounter these beings underground. Survivors try escaping and fighting the threat.Astronauts become monstrous host-inhabiting creatures after space mission. Cave explorers encounter these beings underground. Survivors try escaping and fighting the threat.
Mark Bodin
- Roy
- (as Marc Bodin)
Roberto Barrese
- Speleologist
- (as Robert Barrese)
Benedetta Fantoli
- Maureen
- (as Benny Aldrich)
Michele Soavi
- Burt
- (as Mychael Shaw)
Valeria Perilli
- Jill
- (as Judy Perrin)
Danilo Micheli
- Bill
- (as Don Parkinson)
Donald Hodson
- Mr. Raymond
- (uncredited)
Ciro Ippolito
- TV Studio Director
- (uncredited)
Peter Shepherd
- Peter
- (uncredited)
