 | Doug McClure als Greg Collinson |
 | Peter Gilmore als Charles Aitken |
 | Shane Rimmer als Captain Daniels |
 | Lea Brodie als Delphine |
 | Michael Gothard als Atmir |
 | Hal Galili als Grogan |
 | John Ratzenberger als Fenn |
| Derry Power als Jacko |
 | Donald Bisset als Professor Aitken |
 | Ashley Knight als Sandy |
 | Robert Brown als Briggs |
 | Cyd Charisse als Atsil |
 | Daniel Massey als Atraxon |
| Kevin Connor | Director |
| Kevin Connor | Producer |
| Brian Hayles | Screenplay |
| John Dark | Producer |
| Michael Vickers | Original Music Composer |
| Alan Hume | Director of Photography |
| Bill Blunden | Editor |
| Allan Foenander | Casting |
| Jack Maxsted | Art Direction |
| Joan Carpenter | Hairstylist |
| Robin Grantham | Makeup Artist |
| Elliot Scott | Production Design |
| Roger Dicken | Creature Design |
| John Richardson | Visual Effects Supervisor |
| Graham Easton | Production Supervisor |
| Derek V. Browne | Camera Operator |
| Jim Atkinson | Sound Editor |
| Ray Frift | Assistant Director |
| Bryan Coates | Location Manager |
| Doreen Soan | Continuity |
| Alan Cassie | Set Dresser |
| Syd Nightingale | Construction Manager |
| George Gibbs | Special Effects |
| Bert Hearn | Property Master |
| Arthur Wooster | Camera Operator |
| Mike Frift | Assistant Camera |
| Cliff Culley | Matte Painter |
| George Stephenson | Sound |
| Ken Barker | Sound |
| Rita Burgess | Assistant Editor |
| Monica Howe | Wardrobe Master |
| Lorna Hillyard | Wardrobe Master |
| Marc Boyle | Stunt Coordinator |
