"A gang of street boys foil a master crook who sends commands for robberies by cunningly altering a comic strip's wording each week, unknown to writer and printer. The first of the Ealing comedies."
Alastair Sim
as Felix H. Wilkinson
Jack Warner
as Nightingale
Valerie White
as Rhona
Jack Lambert
as Ford
Harry Fowler
as Joe Kirby
Douglas Barr
as Alec
Stanley Escane
as Roy
Ian Dawson
as Norman
Gerald Fox
as Dicky
David Simpson
as Arthur
Albert Hughes
as Wally
John Hudson
as Stan
David Knox
as Dusty
Jeffrey Sirett
as Bill
James Crabbe
as Terry
Joan Dowling
as Clarry
Frederick Piper
as Mr. Kirby
Vida Hope
as Mrs. Kirby
Heather Delaine
as Dorrie Kirby
Paul Demel
as Jago
Alec Finter
as Det.-Sgt. Fothergill
Bruce Belfrage
as B.B.C. Announcer
Grace Arnold
as Dicky’s Mother
Arthur Denton
as Vicar
Robin Hughes
as Selwyn Pike
Howard Douglas
as Watchman
Harry Purvis
as Larry the Bull
Joey Carr
as Shorty
Peter Mullins
as Boy (uncredited)
Andrew Sachs
as Schoolboy (uncredited)
Fred Wood
as Congregation Member (uncredited)
T. E. B. Clarke
Screenplay
Charles Crichton
Director
Douglas Slocombe
Director of Photography
Michael Balcon
Producer
Monty Berman
Camera Operator
Tony Rimmington
Draughtsman
Eric Williams
Sound Supervisor
Seth Holt
Assistant Editor
Mary Habberfield
Sound Editor
Jeff Seaholme
Charles Hasse
Editor
Ernest Irving
Conductor
Stephen Dalby
Sound Recordist
Leslie Rowson
Joseph Bato
Art Direction
Georges Auric
Music
Norman G. Arnold
Hal Mason
Production Supervisor
Slim Hand
Unit Manager
Maurice Selwyn
Clapper Loader
J. Arthur Rank
Presenter
Henry Cornelius
Associate Producer