The crooks in London know how it works. No one carries guns and no one resists the police. Then a new gang appears that go one better. They dress as police and steal from the crooks. This upsets the natural order of the police/criminal relationship and the police and the crooks join forces to catch the IPOs (Impersonating Police Officers), including an armoured car robbery in which the police must help the gangs to set a trap.
Cast
Peter Sellers
Pearly Gates
Lionel Jeffries
Inspector Fred 'Nosey' Parker
Bernard Cribbins
Nervous O'Toole
Nanette Newman
Valerie
Davy Kaye
Trainer King
Bill Kerr
Jack Coombes
Ed Devereaux
Bluey May
Reg Lye
Reg Denton
John Le Mesurier
Assistant Commissioner
Graham Stark
Sid Cooper
Martin Boddey
Superintendent J.S. Forest
Irene Browne
Dowager
Arthur Mullard
Brassknuckles
Tutte Lemkow
Siggy Schmoltz
Dermot Kelly
Misery Martin
Vanda Godsell
Annette
Barry Keegan
Alf
Marianne Stone
Woman at Meeting (uncredited)
Michael Caine
Police Officer (uncredited)
Dennis Price
Educated Ernest (uncredited)
Dick Emery
Adulterous Man (uncredited)
John Junkin
Maurice (uncredited)
Cardew Robinson
Postman (uncredited)
Mario Fabrizi
Van Driver (uncredited)
John Harvey
Sergeant at Police Station (uncredited)
Harold Siddons
Police Constable in Garage (uncredited)
Jack Silk
Police Constable at Station (uncredited)
Deryck Guyler
Police Constable at Scotland Yard (uncredited)
Gerald Sim
Airport Official (uncredited)
Crew
Cliff Owen
Director
Alan Simpson
Writer
Ray Galton
Writer
John Antrobus
Writer
Len Heath
Screenplay
John Warren
Screenplay
Tristam Cones
Editor
Ernest Steward
Director of Photography
Robert Velaise
Executive Producer
Aubrey Baring
Producer
Cecil F. Ford
Associate Producer
E.M. Smedley-Aston
Associate Producer
Richard Rodney Bennett
Music
Ray Hearne
Still Photographer
Ivor Jay
Original Story
William Whistance Smith
Original Story
