Sceneggiatura

• Vivienne Adès — screenplay
• Alfred Travers — screenplay
• Renalt Capes — original story
• Stephen Clarkson — screenplay

Regia

• Alfred Travers — director
• Robert Asher — assistant director

Sonoro

• Hans May — music director
• Eva Catchpole — sound editor
• Harold V. King — sound director
• Cecil Thornton — sound recordist
• Stanley Black — conductor
• Stanley Black — original music composer

Costumi e trucco

• Mrs. Tweedy — wardrobe master
• Henry Hayward — makeup artist
• A. G. Scott — hairstylist

Fotografia

• Gerald Moss — camera operator
• James Wilson — director of photography

Produzione

• Louis H. Jackson — producer
• Fred A. Swan — production supervisor

Montaggio

• Monica Kimick — editor

Cast

• Herbert Lom — Jules de Lisle / Georges de Lisle
• Phyllis Dixey — Penny aka Gloria Gregg
• Terence de Marney — Mike Bergen
• Ronald Frankau — Vincent Barney
• Abraham Sofaer — French Judge
• Eugene Deckers — French Ringmaster
• Cromwell Brothers — Trapeze Act (as The Cromwell Brothers)
• Ernst Ulman — cast
• Ben Williams — cast
• Clarence Wright — cast
• Beryl Measor — cast
• Harold Berens — cast
• Gerald Conway — cast
• Sebastian Cabot — Lottery Office Clerk
• H. G. Guinle — cast
• Andreas Malandrinos — (as Andre Malandrinos)
• Eric Mason — cast
• Marcel Poncin — cast
• Len Sharp — cast
• S. Griffiths-Moss — cast

Scenografia

• R. Holmes Paul — art direction