Costumi e trucco

• Anne Box — hairdresser
• Michael Morris — makeup artist

Sceneggiatura

• Edgar Wallace — original story
• Robert Banks Stewart — screenplay

Produzione

• Ron Fry — production manager
• Ronnie Curtis — casting director
• Jack Greenwood — producer

Sonoro

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

Montaggio

• Derek Holding — editor

Fotografia

• James Wilson — director of photography
• Peter Allwork — camera operator

Regia

• John Llewellyn Moxey — director
• Ted Lewis — assistant director

Scenografia

• Peter Mullins — art direction

Cast

• Maurice Denham — Sir Harold Crossley
• Nadja Regin — Suzanne Crossley
• T. P. McKenna — Martin Somers
• Peter Barkworth — Tom Cotterrell
• John Miller — Lord Hinchcliffe
• Ellen McIntosh — Jane Meldrum
• Iris Russell — Mrs. Webster
• Victor Brooks — Inspector Boyd
• Ian Curry — Haldane
• John Bryans — Artist
• Cavan Malone — Driving instructor
• Anthony Ashdown — Reporter
• Anthony Pendrell — Doctor
• Jon Luxton — Photographer
• G.H. Mulcaster — Elderly Man
• Tony Wall — Young Man
• Joyce Hemson — 1st Woman
• Roberta Desti — 2nd Woman
• Barbara French — 3rd Woman