- Writer:
- Evelyn Frazer
- Writer:
- Vincent Tilsley
- Music composed and conducted by:
- Humphrey Searle
- [Music] played by:
- members of the Sinfonia of London Orchestra
- Film cameraman:
- John McGlashan
- Film editor:
- Keith Latham
- Special effects:
- Bernard Wilkie
- Special effects/designer:
- Stewart Marshall
- Director:
- Mervyn Pinfield
- Producer:
- George R. Foa
- John Brent:
- William Greene
- Esmee Pulford:
- Helen Lindsay
- Howard Milroy:
- Clifford Cox
- Felicity Brent:
- Elizabeth Weaver
- P.C. Mills:
- Stuart Hoyle
- Sgt Oakroyd:
- Norman Mitchell
- Col Swinton:
- Clive Morton
- Edward:
- Kenneth MacKintosh
- Hopkins:
- Mark Dignam
- Richard:
- Philip Madoc
- Professor Cato:
- Robert Harris
- Meissonier:
- Gordon Whiting
- Van Halloren:
- Alan Gifford
- Parsons:
- John Barrett
- Smetanov:
- George Pravda
- Detective:
- Ronald Mayer
- Detective:
- Michael Earl
- Harris:
- Edward Harvey
- Holt:
- Arthur Skinner
- Wilf Marner:
- Howard Douglas
- Restaurant attendant:
- Martin Gordon
- Guard:
- Jonathan Field
