I have nothing much to add to the reviews already here, but that I loved the film. Stylish, beautifully paced, and remarkably suspenseful, it features an intriguingly controlled and flawlessly nuanced performance by Jack Hawkins, who makes you believe it possible that a British agent, hidden for twenty years, could exist undercover at the highest levels of the Third Reich. And as a sign of the 1958 that produced "The Two-Headed Spy," most revealing of the relationships between international film interests that the blacklisted Michael Wilson and Alfred Levitt were denied credit as scriptwriters in a British film because of its U.S. release by Columbia.
However, for the record, I would like to correct a remark made by oxbridgeup from New Hampshire, who took issue with the use of tape recording in a scene, stating that it was not invented until 1947. Tape recording had actually been invented in Germany in the 1930s; it was used extensively in radio stations and by the Gestapo, most effectively as a tool to issue simultaneous statements by Hitler to units at all the various military fronts to give the Fuhrer the illusion of omnipresence. 1947 is the year the technology was introduced in the United States, and was patented by a group funded by Bing Crosby, who saw the potential in the format. An American audio engineer who, while assigned to the U.S. Army Signal Corps, had absconded with two of the pioneering German Magnetophon recorders (and numerous IG Farben magnetic tapes) at WWII's end, presented the technology to MGM and Crosby. Before this forming of Ampex, Farben had held the rights for magnetic tape (originally patented in the '20s as a long paper strip with an iron oxide coating) and AEG for recording/playing decks and their improvements -- most significantly, AC tape bias and stereophonic recording. Farben was, of course, dissolved in 1945 because of its cooperation with the Nazi regime (and notorious production of Xyklon-B), thus leaving its patents for the taking. How the AEG patents were voided is a mystery to me, but perhaps some knowledgeable reader might enlighten us.
