Eric Portman

Character: Kuprin

John Gregson

Character: Smith

Marius Goring

Character: Laye-Parker

Martita Hunt

Character: Madame Kuprin

Natasha Parry

Character: Vera

Mervyn Johns

Character: Holloway

John Phillips

Character: Trifonov

Charles Rea

Character: M.V.D. Officer

Kenneth J. Warren

Character: Makarov

John Bramley

Character: Photographer

John Bennett

Character: Zagornetz

Alfred Hoffman

Character: Hotel Clerk

Kevin Brennan

Character: Hotel Manager

Peter Sallis

Character: Hesketh-Payne

Beryl Measor

Character: Marfushka

Declan Mulholland

Character: Makarov's Assistant

Maurice Hedley

Character: British Ambassador

Ann Patrick

Character: Nina

Steve Reagan

Character: Mr. Ashby (as Steve Regan)

John Rutland

Character: Ticket Collector

Ann Dimitri

Character: Tamara

Peter Elliott

Character: Doctor

Frank Sieman

Character: Reception Clerk

Patrick Troughton

Character: Narrator (voice)