Reparto
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
Frankie Howerd
The Barrow Boy
Kenneth Connor
Cab Driver (uncredited)
Harold Goodwin
Parcels Clerk (uncredited)
Fred Griffiths
Junk Man (uncredited)
Lucy Griffiths
Miss Pringle (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)
Peter Williams
Detective at Parcels Office (uncredited)
Neil Wilson
Policeman (uncredited)
