A light story about cryptographers... not an easy sell as a script, but afforded a platform for the talents of John Gielgud, Dirk Bogarde, Lilli Palmer, the spunky Susannah York and others. The tiny message about being careful when working for a classified department is more and more relevant, as Microsoft just discovered when their source code was stolen via the hijacking of an employee's computer on the air from home. When in doubt, lengthen the password...