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.
Dirk Bogarde
as Sebastian
Susannah York
as Rebecca Howard
Lilli Palmer
as Elsa Shahn
John Gielgud
as Head of Intelligence
Janet Munro
as Carol Fancy
Ronald Fraser
as Toby
Margaret Johnston
as Miss Elliott
Nigel Davenport
as Gen. Phillips
John Ronane
as Jameson
Hayward Morse
as Gavin
Donald Sutherland
as Ackerman
Ann Beach
as Pamela
