Guion

• Gaston Lazare — writer
• Guy Elmes — writer

Montaje

• Geoffrey Muller — editor

Cámara

• A.T. Dinsdale — director of photography

Arte

• George Haslam — art direction

Dirección

• Vernon Sewell — director

Sonido

• Eric Spear — music

Reparto

• Dermot Walsh — Frank Manning
• Hazel Court — Clare Manning
• Hermione Baddeley — Madame Del Mar
• Alexander Gauge — Smith
• Bill Travers — Rex
• Archie Duncan — Jim Fenton
• James Vivian — Larry Fenton
• Frederick Schrecker — Plattnaur
• John Penrose — Paulson
• Hugh Latimer — Inspector Barlow
• Beryl Baxter — Plattnauer's Accomplice
• Gwen Bacon — Matron
• Maxwell Foster — Dr. Stevenson
• Monti DeLyle — Dance Director
• Howard Lang — Policeman