Directed by
| Arthur B. Woods | ||
Writing Credits (in alphabetical order)
| Mignon G. Eberhart | ... | (novel) |
| Brock Williams | ... | (writer) |
| Basil Woon | ... | (writer) (as Basil Dillon) |
Cast (in credits order)
| Hugh Williams | ... | Dr. Thurlow | |
| Chili Bouchier | ... | Betty Trimmer | |
| Garry Marsh | ... | Dr. Mortimer | |
| Reginald Purdell | ... | Askew | |
| James Stephenson | ... | Inspector Clarke | |
 |
Glen Alyn | ... | Isabel Simmonds |
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John Carol | ... | Merridew |
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Lesley Brook | ... | Mary Cresswell |
| Robert Rendel | ... | Dr. Fletcher | |
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Aubrey Pollock | ... | Dr. Cresswell |
| Rest of cast listed alphabetically: | |||
| Elsa Buchanan | ... | (uncredited) | |
| Syd Crossley | ... | (uncredited) | |
| Katie Johnson | ... | (uncredited) | |
|
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Ross Landon | ... | (uncredited) |
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Muriel Pope | ... | (uncredited) |
| Ivy Tresmand | ... | (uncredited) | |
Produced by
| Irving Asher | ... | producer |
Cinematography by
| Robert LaPresle | ||
