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Cast
- Jack HoltJack Hart aka Quinn
- Constance CummingsJulie Arnold
- Boris KarloffJim Henderson
- Claude KingArnold
- Bertha MannNurse Edwards
- Edward Van SloanDr. August Steiner / Dr. Alec Munsell / Mr. X
- Willard RobertsonCapt. E.J. Hawkes
- Thomas E. JacksonAgent Burke
- Martha MattoxHotel Ansonia Maid
- Jessie ArnoldEastland Hospital Nurse
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