Reparto

• John Le Mesurier — Warden
• Jack Watling — Frank Leamington
• Bernard Archard — Trainer
• Barry Keegan — Charles Berry
• Ann Bell — Susan
• Campbell Singer — Hurley Brown
• Charles Lloyd Pack — Miller
• David Bauer — Louba
• Russell Waters — Clerk of the Court
• George Bishop — Judge
• Gerald Sim — Uniformed Doorman
• Andre Mikhelson — 1srt Croupier
• Monti DeLyle — 2nd Croupier
• Adrian Oker — Waiter
• Gordon Phillott — Waiter
• John Wilder — Ranley Headmaster (uncredited)
• John Wilder — Doorman

Dirección

• Alan Cooke — director
• Ted Lewis — assistant director

Guion

• Edgar Wallace — original story
• Lindsay Galloway — screenplay

Producción

• Jack Greenwood — producer
• Ronnie Curtis — casting director
• Joe Levy — production manager

Sonido

• Bernard Ebbinghouse — original music composer
• Ronald Abbott — sound recordist
• Brian Blamey — sound editor
• Sidney Rider — sound recordist

Cámara

• Bert Mason — director of photography
• Herbert Smith — camera operator

Montaje

• Derek Holding — editor

Vestuario y maquillaje

• Hilda Fox — hairdresser
• Aldo Manganaro — makeup artist
• Eileen Welch — wardrobe master

Arte

• Peter Mullins — art direction