Directed by
| Sidney W. Pink | ... | (as Sidney Pink) |
Writing Credits
| Sidney W. Pink | ... | (original story) (as Sid Pink) |
| Ib Melchior | ... | (screenplay) and |
| Sidney W. Pink | ... | (screenplay) (as Sid Pink) |
Cast (in credits order)
| John Agar | ... | Capt. Don Graham | |
 |
Carl Ottosen | ... | Commander Eric |
| Ove Sprogøe | ... | Barry O'Sullivan | |
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Louis Miehe-Renard | ... | Svend (as Louis Meihe Renard) |
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Peter Mönch | ... | Karl |
| Greta Thyssen | ... | Greta Thyssen | |
| Ann Smyrner | ... | Ingrid | |
| Mimi Heinrich | ... | Ursula | |
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Annie Birgit Garde | ... | Ellen |
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Ulla Moritz | ... | Lise |
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Bente Juul | ... | Colleen (as Bente Juel) |
| Rest of cast listed alphabetically: | |||
| Julian Burton | ... | Alien Brain (voice) (uncredited) | |
Produced by
| Samuel Z. Arkoff | ... | producer (uncredited) |
| Sidney W. Pink | ... | producer (as Sidney Pink) |
| Johann Zalabery | ... | associate producer (as J. H. Zalabery) |
Music by
| Ib Glindemann | ||
| Ronald Stein | ... | (US version) |
Casting By
| William Schuller | ||
Art Direction by
| Herbi Gärtner | ... | (scenemaster) |
Set Decoration by
| Helge Hansen | ||
Costume Design by
| Helge Hansen | ... | (uncredited) |
Makeup Department
| Calma Jensen | ... | makeup artist (as Calma) |
Production Management
| Eric Moberg | ... | production supervisor |
Second Unit Director or Assistant Director
| Szasza Zalabery | ... | assistant director |
Art Department
| Otto Lund | ... | architect |
Sound Department
| Paul Nyrup | ... | sound |
Special Effects by
| Ronny Schaemmel | ... | special effects photographer (as Ronny Schoemmel) |
| Bert I. Gordon | ... | special effects (uncredited) |
Visual Effects by
| Børge Hamberg | ... | abstracts |
| Krogh | ... | miniatures |
| Wah Chang | ... | stop-motion animator: cyclops (uncredited) |
| Jim Danforth | ... | stop-motion animator: cyclops (uncredited) |
Camera and Electrical Department
| Carlo Rasmussen | ... | electrician |
| Edvard Svendsen | ... | electrician |
| Aage Wiltrup | ... | cameraman (as Age Wiltrup) |
Costume and Wardrobe Department
| Hanny Zalabery | ... | wardrobe supervisor |
Editorial Department
| Ib Melchior | ... | montage director |
| Tove Palsbo | ... | cutter |
| Thok Søndergaard | ... | cutter |
Music Department
| Ib Glindemann | ... | conductor |
| Kendall Schmidt | ... | composer: new end title music (VHS release) |
