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