Ray Barrett

Henry Fraser

Katharine Blake

Claudia

Nigel Stock

George Matthews

William Hartnell

Insp. Roberts

Patricia Bredin

Lucy

Richard Clarke

Charles Wagner

Noel Trevarthen

Blake

Herbert Wise

Director

Jimmy Sangster

Screenplay

Edgar Wallace

Novel

Jack Greenwood

Producer

Bernard Ebbinghouse

Music

James Wilson

Director of Photography

Derek Holding

Editor

Ronnie Curtis

Casting Director

Peter Mullins

Art Direction

Gladys Leakey

Hairdresser

Stella Morris

Makeup Artist

Ron Fry

Production Manager

Ted Lewis

Assistant Director

Brian Blamey

Sound Editor

Sidney Rider

Sound Recordist

Eric Stockl

Sound Recordist

Peter Allwork

Camera Operator