Cast
- Juan Torena as Sir Alfred Gray
- Juan Torena as Donald Guilbert
- Blanca de Castejón as Sandra
- Carlos Villarías as Sir Arnold Bronson
- Julio Villarreal as Harry Palmer
- Juan Aristi Eulate as Capitán Lester
- André Cheron as Dr. Dupont
- Emma Roldán as Marie
- Antonio Vidal as Beverly
- Roberto E. Guzmán
- Rafael Alcayde
Crew
- Lewis Seiler · Director
- Matías Cirici Ventalló · Writer
- Denison Clift · Writer
- Garrett Fort · Writer
- Jack Wagner · Writer
- William Fox · Producer
- Sidney Wagner · Cinematographer