Sidney James

Sergeant Frank Wilkins

Eric Barker

Inspector Mills

Kenneth Connor

Constable Charlie Constable

Charles Hawtrey

Special Constable Timothy Gorse

Kenneth Williams

Constable Stanley Benson

Leslie Phillips

Constable Tom Potter

Joan Sims

Policewoman Gloria Passworthy

Hattie Jacques

Sergeant Laura Moon

Shirley Eaton

Sally Barry

Cyril Chamberlain

Constable Thurston

Joan Hickson

Mrs. May

Irene Handl

Willie's Mother

Terence Longdon

Herbert Hall

Jill Adams

Policewoman Harrison

Freddie Mills

Jewel Thief

Brian Oulton

Store Manager

Victor Maddern

Detective Sergeant Liddell

Joan Young

Lady Mayoress

Esma Cannon

Deaf Old Lady

Hilda Fenemore

Woman Needing a Penny

Noel Dyson

Fluff's Owner

Tom Gill

Citizen

Frank Forsyth

Citizen

John Antrobus

Citizen

Robin Ray

Assistant Manager

Michael Balfour

Matt

Diane Aubrey

Honoria

Ian Curry

Eric

Mary Law

Shop Assistant

Lucy Griffiths

Miss Horton

Eric Corrie

Citizen

Peter Bennett

Pickpocket

Jack Taylor

Cliff

Eric Boon

Shorty

Dorinda Stevens

Young Woman

William Baskiville

Constable (uncredited)

Paul Beradi

Angry Citizen (uncredited)

Tom Cubitt

Jeweller (uncredited)

Arnold Diamond

Chief Constable (voice) (uncredited)

Norman Fisher

Angry Citizen (uncredited)

Tex Fuller

Van Man (uncredited)

Colin Gordon

(uncredited)

Jack Hetherington

Tied-Up Man (uncredited)

Arthur Howell

Constable (uncredited)

Robert Howell

Little Willie (uncredited)

Mary Jones

Radio Actress (voice) (uncredited)

Peter Kelly

Jewel Thief (uncredited)

Ken Kennedy

Wall-Eyed Man (uncredited)

Janetta Lake

Girl with Dog (uncredited)

John Langley

Boy in Cart (uncredited)

Don McMurray

Policeman (uncredited)

Guy Mills

Constable (uncredited)

Joe Phelps

Constable (uncredited)

Alfred Pim

Newsvendor (uncredited)

Fred Real

Shopper (uncredited)

Anthony Sagar

Angry Citizen (uncredited)

Bruce Seton

(uncredited)

Jack Silk

Constable (uncredited)

Charles Stanley

Newspaper Man (uncredited)

Marianne Stone

Miss Horton (voice) (uncredited)

Reg Thomason

Radio Operator (uncredited)

Frederick Treves

Radio Announcer (voice) (uncredited)

Robert Vossler

Constable (uncredited)

Kenneth J. Warren

Chauffeur (uncredited)

Margaret St. Barbe West

Shop Assistant (uncredited)

Ian Wilson

(uncredited)