Starship C57D travels to planet Altair 4 in search of the crew of spaceship "Bellerophon," a scientific expedition that has been missing for 20 years, only to find themselves unwelcome by the expedition's lone survivor and warned of destruction by an invisible force if they don't turn back immediately.
| Directing | Fred M. Wilcox | Director |
| Writing | Cyril Hume | Screenplay |
| Production | Nicholas Nayfack | Producer |
| Sound | Bebe Barron | Original Music Composer |
| Sound | Louis Barron | Original Music Composer |
| Camera | George J. Folsey | Director of Photography |
| Editing | Ferris Webster | Editor |
| Art | Cedric Gibbons | Art Direction |
| Art | Arthur Lonergan | Art Direction |
| Art | Hugh Hunt | Set Decoration |
| Art | Edwin B. Willis | Set Decoration |
| Costume & Make-Up | Walter Plunkett | Costume Design |
| Costume & Make-Up | Helen Rose | Costume Design |
| Sound | John Lipow | Sound Editor |
| Sound | Kendrick Kinney | Sound Editor |
| Writing | Irving Block | Story |
| Writing | Allen Adler | Story |
| Writing | William Shakespeare | Original Story |
| Art | Irving Block | Production Design |
| Art | Mentor Huebner | Production Design |
| Directing | George Rhein | Assistant Director |
| Directing | John Greenwald | Assistant Director |
| Art | A.D. Flowers | Set Dresser |
| Sound | Wesley C. Miller | Sound Recordist |
| Sound | James Brock | Sound |
| Sound | Kurt Hernfeld | Sound Editor |
| Crew | A. Arnold Gillespie | Special Effects |
| Crew | Joshua Meador | Special Effects |
| Crew | Warren Newcombe | Special Effects |
| Crew | Irving G. Ries | Special Effects |
| Crew | Logan Frazee | Special Effects |
| Crew | Doug Hubbard | Special Effects |
| Crew | Robert Kinoshita | Special Effects |
| Crew | Glen Robinson | Special Effects Technician |
| Crew | Franklyn Soldo | Special Effects Technician |
| Visual Effects | Bob Abrams | Visual Effects |
| Visual Effects | Joshua Meador | Visual Effects |
