Cast
- John Loder as Reginald Parker
- John Loder as Edward Grey
- June Duprez as April Manby Carson
- Michael St. Angel as Lt. Bob Carson
- Miles Mander as Chief Inspector W.R. Allison
- Rose Hobart as Dorothy Kent
- Gilbert Emery as Dr. Manby
- Rex Evans as Leslie Shelton
- Matthew Boulton as Inspector Graham
- Olaf Hytten as Banks - the valet
- Lydia Bilbrook as Mrs. Manby
Crew
- Max Nosseck · Director
- Arnold Lipp · Writer
- Max Nosseck · Writer
- Hugh Gray · Writer
- Herman Schlom · Producer
- Leigh Harline · Composer
- J. Roy Hunt · Cinematographer
- Les Millbrook · Editor