Susan Strasberg

Penny Appleby

Ronald Lewis

Robert

Ann Todd

Jane Appleby

Christopher Lee

Doctor Pierre Gerrard

John Serret

Inspector Legrand

Leonard Sachs

Mr. Spratt

Anne Blake

Marie the Maid

Fred Johnson

Mr. Appleby

Madame Lobegue

Swiss Air Hostess (uncredited)

Bernard Browne

Gendarme (uncredited)

Frederick Rawlings

Plainclothes Sergeant (uncredited)

Richard Klee

Plainclothes Sergeant (uncredited)

Brian Jackson

Plainclothes Officer (uncredited)

Heinz Bernard

Plainclothes Officer (uncredited)

Frederick Schrecker

Plainclothes Officer (uncredited)

Gordon Sterne

Policeman (uncredited)

Rodney Burke

Policeman (uncredited)

Jimmy Sangster

Writer

Clifton Parker

Original Music Composer

Jimmy Sangster

Producer

Eric Boyd-Perkins

Editor

Douglas Slocombe

Director of Photography

Seth Holt

Director

Bernard Robinson

Production Design

Michael Carreras

Executive Producer

Desmond Davis

Camera Operator

Terry Lens

Second Assistant Director

George Higgins

Still Photographer

William Hill

Production Manager

Pamela Mann

Continuity

Len Shilton

Sound Recordist

James Needs

Supervising Editor

John Hollingsworth

Music Supervisor

William Constable

Assistant Art Director

Les Bowie

Special Effects

Ray Andrew

Clapper Loader

David Tomblin

Assistant Director

Basil Newall

Makeup Artist

Jim Groom

Sound Editor

Len Harris

Additional Camera

Egil S. Woxholt

Underwater Camera

Stuart Lyons

Casting

Harry Oakes

Additional Camera

John Crome

Assistant Editor

Thomas Goswell

Art Direction

Teddy Mason

Sound Recordist

John Crome

Assistant Sound Editor

Eileen Bates

Hairstylist

Ian Scoones

Special Effects Assistant

Dora Lloyd

Wardrobe Master

Les Hammond

Sound Recordist

John M. Jordan

Underwater Camera