Dirk Bogarde

Nicholas Whistler

Sylva Koscina

Vlasta Simoneva

Robert Morley

Col. Cunliffe

Leo McKern

Simoneva

Roger Delgado

Josef

Derek Fowlds

Sun Bathing Man

Eric Pohlmann

Golushha

John Le Mesurier

Roger Allsop

Noel Harrison

Johnnie

Amanda Grinling

Cunliffe’s Secretary

Philo Hauser

Vicek

John Junkin

Clerk in Opening Scene

Jill Melford

Lorna

Derek Nimmo

Fred

Richard Vernon

Roddinghead

Brook Williams

Leon

Gertan Klauber

Technician in Czech Glass Factory

Richard Pasco

Plakov

Alan Tilvern

Simenova's Assistant

Norman Bird

Employment Exchange Clerk

Andre Charisse

Waiter

Frank Finlay

British Embassy Porter

Sandra Hampton

Russian Dancer

Harriet Medin

Hotel Receptionist

William Mervyn

Passenger on Plane

Tiberio Mitri

The Milkman

George Pravda

Pravelko

Robert Rietti

John Standing

Men's Room Attendant

Eddie Boyce

Man in Labour Exchange

Jim Brady

Worker in Canteen

Igo Meggido

Russian Dancer (uncredited)

Reg Thomason

Diner in Restaurant (uncredited)

Pietro Tordi

Old man at the swimming pool (uncredited)