Trailer
Cast
Kenneth Connor
Cab Driver (uncredited)
Edie Martin
Lettice (uncredited)
Jack Melford
Detective (uncredited)
Ewan Roberts
Constable (uncredited)
Cecil Parker
Claude, alias 'Major Courtney'
Fred Griffiths
Junk Man (uncredited)
Alec Guinness
Professor Marcus
Peter Sellers
Harry, alias 'Mr. Robinson'
Arthur Mullard
(uncredited)
Herbert Lom
Louis, alias 'Mr. Harvey'
Katie Johnson
Mrs. Wilberforce
Jack Warner
The Superintendent
Harold Goodwin
Parcels Clerk (uncredited)
Sam Kydd
Second Cab Driver (uncredited)
Lucy Griffiths
Miss Pringle (uncredited)
Stratford Johns
Security Guard (uncredited)
Peter Williams
Detective at Parcels Office (uncredited)
Neil Wilson
Policeman (uncredited)
Danny Green
'One-Round', alias 'Mr. Lawson'