Nicholas Whistler
Dirk Bogarde
Vlasta Simoneva
Sylva Koscina
Vicek
Philo Hauser
Clerk in Opening Scene
John Junkin
Lorna
Jill Melford
Fred
Derek Nimmo
Roddinghead
Richard Vernon
Leon
Brook Williams
Technician in Czech Glass Factory
Gertan Klauber
Plakov
Richard Pasco
Simenova's Assistant
Alan Tilvern
Employment Exchange Clerk
Norman Bird
Col. Cunliffe
Robert Morley
Waiter
Andre Charisse
British Embassy Porter
Frank Finlay
Russian Dancer
Sandra Hampton
Hotel Receptionist
Harriet Medin
Passenger on Plane
William Mervyn
The Milkman
Tiberio Mitri
Pravelko
George Pravda
Robert Rietti
Men's Room Attendant
John Standing
Simoneva
Leo McKern
Josef
Roger Delgado
Sun Bathing Man
Derek Fowlds
Golushha
Eric Pohlmann
Roger Allsop
John Le Mesurier
Johnnie
Noel Harrison
Cunliffe’s Secretary
Amanda Grinling
Original Music Composer
Angelo Francesco Lavagnino
Director
Ralph Thomas
Novel
Lionel Davidson
Art Direction
Syd Cain
Costume Design
Yvonne Caffin
Producer
Betty E. Box
Director of Photography
Ernest Steward
Screenplay
Lukas Heller
Editor
Alfred Roome