- Antonio Sabato
- Capt. John Boyd
- Yanti Somer
- Julie
- Malisa Longo
- Lois
- Patrizia Gori
- Trissa Crew
- Giacomo Rossi Stuart
- Roger
- Roberto Bianchetti
- (as Robert Barnes)
- Aldo Canti
- Kuba - the Alien
- Enrico Gozzo
- (as Henry Goddard)
- Licinia Lentini
- Cmdr. King's Assistant
- Frank Siedlitz
- Herb Julian
- Massimo Righi
- Dr. Wilkes
- Dino Scandiuzzi
- Jack
- Nicole Stoliaroff
- Trissa Crew Member
- Ian Pulley
- Anthorian Leader
- Venantino Venantini
- Paul
- Jacques Herlin
- Prof. Carr
- Ines Pellegrini
- Sonia
- West Buchanan
- Herb
- Roger Browne
- Cmdr. King
- Ryan Paris
- (uncredited)
- Iren Szeremi
- (uncredited)
- Ivan Tirapani
- (uncredited)
- Anna Toffoli
- (uncredited)