Sebastian is an undisciplined mathematics genius who works in the "cipher bureau" of the British Intelligence. While cracking enemy codes, Sebastian finds time to romance co-worker Rebecca Howard.
Sebastian
Dirk Bogarde
Rebecca Howard
Susannah York
Elsa Shahn
Lilli Palmer
Head of Intelligence
John Gielgud
Carol Fancy
Janet Munro
Toby
Ronald Fraser
Miss Elliott
Margaret Johnston
Gen. Phillips
Nigel Davenport
Jameson
John Ronane
Gavin
Hayward Morse
Ackerman
Donald Sutherland
Pamela
Ann Beach
Tilly
Susan Whitman
Naomi
Ann Sidney
Ginny
Veronica Clifford
Thelma
Louise Purnell
'UG' Girl
Portland Mason
Man with Dog
James Belchamber
Taxi Driver
Charles Farrell
Chess Player
Charles Lloyd Pack
TV Disc Jockey
Alan Freeman
Randy
Jeanne Roland
Joan
Lynn Pinkney
Uncredited
Sally Douglas
Uncredited
Stuart Hoyle