Credits
Cast

Alec Guinness
Professor Marcus

Cecil Parker
Claude, alias 'Major Courtney'

Herbert Lom
Louis, alias 'Mr. Harvey'

Peter Sellers
Harry, alias 'Mr. Robinson'

Danny Green
'One-Round', alias 'Mr. Lawson'

Katie Johnson
Mrs. Wilberforce

Jack Warner
The Superintendent

Philip Stainton
The Sergeant

Frankie Howerd
The Barrow Boy
Madge Brindley
Large Lady (uncredited)
Hélène Burls
Hypatia (uncredited)

Kenneth Connor
Cab Driver (uncredited)
Michael Corcoran
Burglar (uncredited)

Harold Goodwin
Parcels Clerk (uncredited)
Fred Griffiths
Junk Man (uncredited)

Lucy Griffiths
Miss Pringle (uncredited)
George Hilsdon
Security Van Driver (uncredited)
Vincent Holman
Station Master (uncredited)

Stratford Johns
Security Guard (uncredited)

Sam Kydd
Second Cab Driver (uncredited)

Edie Martin
Lettice (uncredited)

Jack Melford
Detective (uncredited)

Arthur Mullard
(uncredited)

Ewan Roberts
Constable (uncredited)
George Roderick
Radio Car Policeman (uncredited)
John Rudling
Nervous Man (uncredited)
Leonard Sharp
Pavement Artist (uncredited)

Peter Williams
Detective at Parcels Office (uncredited)

Neil Wilson
Policeman (uncredited)
Phoebe Hodgson
Constance (uncredited)
Art
Jim Morahan
Art Direction
Bert Davey
Assistant Art Director
Norman Dorme
Set Designer
Jack Shampan
Set Designer
Tony Rimmington
Set Designer
Camera
Chic Waterson
Camera Operator

Otto Heller
Director of Photography
Alan Bryce
First Assistant Camera
Ray Parslow
First Assistant Camera
Herbert Smith
First Assistant Camera
Costume & Make-Up
Anthony Mendleson
Costume Design
Daphne Martin
Hairstylist
Alex Garfath
Makeup Artist
Crew
W. Simpson Robinson
Scenic Artist
Sydney Pearson
Special Effects
Directing

Tom Pevsner
Assistant Director
Felicia Manheim
Continuity

Alexander Mackendrick
Director
Editing
Robin Clarke
Assistant Editor

Jim Clark
Assistant Editor
Harry Aldous
Assistant Editor
Joan Bridge
Color Timer
Jack Harris
Editor
Production

Seth Holt
Associate Producer

Michael Balcon
Producer
Hal Mason
Production Supervisor
David Peers
Unit Production Manager
Sound
Dock Mathieson
Music Director

Tristram Cary
Original Music Composer
Gordon Stone
Sound Editor
Leo Wilkins
Sound Recordist
Stephen Dalby
Supervising Sound Editor
Writing
Jimmy O'Connor
Screenplay

William Rose
Screenplay, Story