Robin Phillips

Paul Pennyfeather

Michael Elwyn

Alastair Vane-Trumpington

Donald Wolfit

Dr. Augustus Fagan

Leo McKern

Captain Grimes

Geneviève Page

Margot Beste-Chetwynde

Felix Aylmer

Judge

Colin Blakely

Solomon Philbrick

Robert Harris

Prendergast

Griffith Jones

Sir Humphrey Maltravers

Patrick Magee

Maniac

Paul Rogers

Chief Warder

Donald Sinden

The Prison Governor

Rodney Bewes

Arthur Potts

Roland Curram

Otto Silenus

Patience Collier

Flossie Fagan

Jack Watson

Gallery Warder

Kenneth Griffith

Mr. Church

Helen Christie

Mrs. Clutterbuck

Michael Newport

Lord Tangent

Duncan Lamont

Inspector Bruce

Clifton Jones

Chokey

Joan Haythorne

Miss Hart

Jeremy Child

Nigel

John Cater

Blackall

Roy Beck

Public Schoolboy (uncredited)

John Krish

Director

Reg Bream

Assistant Art Director

Wally Fairweather

Second Unit Director of Photography

John Barry

Art Direction