Original title: Billion Dollar Brain
Year: 1967
Director: Ken Russell
Cast: Michael Caine, Karl Malden, Ed Begley, Oskar Homolka, Françoise Dorléac, Guy Doleman, Vladek Sheybal, Milo Sperber
Genre: Thriller | Spy film
Synopsis: Harry Palmer has left the British Secret Service and become a private detective. One of his first assignments is to deliver an apparently innocent thermos flask to an old friend in Helsinki, Palmer is suspicious of the flask contents and begins to doubt the motives of his friend and those of his boss a Texan billionaire.
Source: FILMAFFINITY