Richard Attenborough

Percy Boon

Alastair Sim

Mr. Squales

Fay Compton

Mrs. Josser

Stephen Murray

Uncle Henry

Wylie Watson

Mr. Josser

Susan Shaw

Doris Josser

Hugh Griffith

Headlam Fynne

Joyce Carey

Mrs Vizzard

Ivy St. Helier

Connie Coke

Andrew Crawford

Bill

Eleanor Summerfield

The Blonde

Jack McNaughton

Jimmy

Maurice Denham

Jack Rufus

Aubrey Dexter

Mr Battlebury

Henry Hewitt

Verriter

Arthur Howard

Mr Chinkwell

Fabia Drake

Mrs Jan Byl

Sydney Tafler

Night Club Receptionist

Henry Edwards

Police Superintendant

George Cross

Inspector Cartwright

Cyril Chamberlain

Det Sgt Wilson

Edward Evans

Det Sgt Taylor

John Salew

Mr Banks

Russell Waters

Clerk of the Court

Cecil Trouncer

Mr Henry Wassall KC

Kenneth Downey

Mr Veezey Blaize KC

Ivor Barnard

Mr Justice Plymme

Basil Cunard

Foreman of the Jury

Wensley Pithey

1st Warden

Manville Tarrant

2nd Warden

Arthur Lowe

Commuter on Train (uncredited)

Ewen Solon

Clerk (uncredited)

Jack May

Bystander (uncredited)

Reg Thomason

Bystander (uncredited)

Myrette Morven

Female Employee (uncredited)

Ewan Roberts

1st Policeman (uncredited)

Stanley Beard

2nd Policeman (uncredited)

Leo Genn

Narrator (uncredited)