"Based on the true story of Melbourne Johns, an aircraft factory foreman sent to France to prevent the Nazis getting hold of some vital equipment."
Clifford Evans
as Fred Carrick
Constance Cummings
as Anne Stafford
Tommy Trinder
as Tommy Hoskins
Gordon Jackson
as Alastair 'Jock' MacFarlan, 19th Fusillers
Robert Morley
as Mayor Coutare of Bivary
Owen Reynolds
as Collins, Burns & Fawcett Works Manager
Bill Blewitt
as Aircraft Spotter on Works Roof
Charles Victor
as Aircraft Spotter
John Williams
as 'English' Army Captain
Anthony Ainley
as Boy
Ronald Adam
as Sir Charles Fawcett, Managing Director
Anita Palacine
as La Tour Barmaid
Ernest Milton
as Stationmaster in La Tour
Paul Bonifas
as Prefect of Rouville
Francis L. Sullivan
as French Skipper
Thora Hird
as Barmaid
Mervyn Johns
as Official, Passport Office
Eric Maturin
as Older Man
John Boxer
as Official
J. B. Priestley
Story
Charles Frend
Director
John Dighton
Screenplay
Thomas N. Morahan
Art Direction
Michael Balcon
Producer
Robert Hamer
Editor
Wilkie Cooper
Director of Photography
Angus MacPhail
Leslie Arliss
Len Page
Sound Recordist
Ernest Irving
Music Director
Alberto Cavalcanti
Associate Producer
Daphne Heathcote
Continuity
Ronald Brantford
Assistant Director
Cecil Cooney
Camera Operator
John Croydon
Production Manager
Eddie Orton
Still Photographer
William Walton
Original Music Composer