Robert Beatty

Dr. Mark Benton

Elizabeth Sellars

Della Freeman

Peter Coke

Det. Insp. George Bellamy

Hugh Kelly

Dr. Craig

Vida Hope

Jackie Leroy

Janet Butler

Sister Rogers

Ferdy Mayne

Charles Constance

James Raglan

Supt. Grayson

Hugh Pryse

Mr. Rattray

George Benson

Prescott

Roger Delgado

Felix Galegos

Frank Atkinson

Railway Ticket Clerk (uncredited)

Donald Conlon

Helios Restaurant Patron (uncredited)

Arthur Dibbs

Helios Restaurant Patron (uncredited)

Robert Gregory

Man at Northolt Airport (uncredited)

Jean Hardwicke

Sister (uncredited)

Barry Johns

Hospital Orderly (uncredited)

Anthony Lang

Johnny (uncredited)

Ronald Leigh-Hunt

Sgt. Lewis (uncredited)

Richard Neller

Hospital Visitor (uncredited)

Harold Sanderson

Hospital Visitor (uncredited)

Marc Sheldon

Waiter (uncredited)

Toke Townley

Fred Barker (uncredited)

Martyn C. Webster

Director

Francis Durbridge

Original Series Creator

A.R. Rawlinson

Screenplay

John O'Gorman

Makeup Artist

Ernest G. Roy

Producer

Joseph Sterling

Editor

Bernard Robinson

Art Direction

Gerald Gibbs

Director of Photography

E.S. Laurie

Production Manager

Betty Lee

Hairdresser

Wilfred Burns

Music

Buddy Booth

Third Assistant Director

Olive Swinney

Wardrobe Assistant

Harry Raynham

Sound

Peter Lamb

Clapper Loader

Noel Rowland

Camera Operator

Marjorie Owens

Continuity

Pat Kelly

Assistant Director

W. H. Lindop

Sound Recordist

Wilfred Burns

Conductor