Directed by
| Ernest B. Schoedsack | ||
Writing Credits
| Tom Kilpatrick | ... | (original screen play) |
| Malcolm Stuart Boylan | ... | (uncredited) |
Cast (in credits order) verified as complete
| Albert Dekker | ... | Dr. Thorkel | |
 |
Thomas Coley | ... | Bill Stockton |
| Janice Logan | ... | Dr. Mary Robinson | |
| Charles Halton | ... | Dr. Bulfinch | |
| Victor Kilian | ... | Steve Baker | |
|
|
Frank Yaconelli | ... | Pedro |
| Paul Fix | ... | Dr. Mendoza | |
| Frank Reicher | ... | Professor Kendall | |
| Rest of cast listed alphabetically: | |||
| William Wilkerson | ... | Silent Indian (uncredited) | |
Produced by
| Merian C. Cooper | ... | producer (uncredited) |
| William LeBaron | ... | executive producer (uncredited) |
| Dale Van Every | ... | producer |
Music by
| Gerard Carbonara | ||
| Albert Hay Malotte | ||
| Ernst Toch | ||
Cinematography by
| Henry Sharp | ... | director of photography |
Editing by
| Ellsworth Hoagland | ||
Art Direction by
| Hans Dreier | ||
| A. Earl Hedrick | ... | (as Earl Hedrick) |
| Robert Odell | ... | (uncredited) |
Makeup Department
| Charles Gemora | ... | makeup artist (uncredited) |
Second Unit Director or Assistant Director
| Hollingsworth Morse | ... | assistant director (uncredited) |
Art Department
| A.E. Freudeman | ... | interior decorator |
| Henri Jaffa | ... | associate color art director: for the Technicolor Company |
| Natalie Kalmus | ... | color art director: for the Technicolor Company |
Sound Department
| Harry Lindgren | ... | sound recordist |
| Richard Olson | ... | sound recordist |
Visual Effects by
| Farciot Edouart | ... | process photography |
| W. Wallace Kelley | ... | process photography (as Wallace Kelley) |
| Jan Domela | ... | matte artist (uncredited) |
| Gordon Jennings | ... | special photographic effects (uncredited) |
| Paul K. Lerpae | ... | optical cinematography (uncredited) |
Camera and Electrical Department
| Winton C. Hoch | ... | associate director of photography (as Winton Hoch) |
Music Department
| Irvin Talbot | ... | conductor (uncredited) |
