Dr. Hawley Harvey Crippen

Donald Pleasence

Belle Crippen

Coral Browne

Chief Inspector Dew

John Arnatt

Lord Chief Justice

Oliver Johnston

Harry

John Lee

The Governor

Edward Underdown

Dr. Rogers

Hamilton Dyce

Mr. Arditti

Basil Henson

Miss Curnow

Totti Truman Taylor

Harding

Edward Cast

Chemist

Colin Rix

Police Sergeant Outside Courtroom (uncredited)

Terence Brook

Ethel Le Neve

Samantha Eggar

Defence QC Clerk (uncredited)

Eric Dodson

Radio Officer Andrews (uncredited)

Max Faulkner

Ships Steward (uncredited)

Guy Standeven

Courtroom Spectator (uncredited)

John Tatham

R.D. Muir (as Sir Donald Wolfit)

Donald Wolfit

Captain McKenzie

James Robertson Justice

Mr. Tobin

Geoffrey Toone

Dr. Pepper

Douglas Bradley-Smith

Mrs. Clara Arditti

Olga Lindo

Mrs. Jackson

Elspeth March

Bruce Martin

Paul Carpenter

Director

Robert Lynn

Director of Photography

Nicolas Roeg

Camera Operator

Alex Thomson

Editor

Lee Doig

Art Direction

Robert Jones

Still Photographer

Ronnie Pilgrim

Makeup Artist

Bob Clark

Sound

Edgar Vetter

Producer

John Clein

Hairstylist

Polly Young

Music

Ken Jones

Writer

Leigh Vance