Billion-Dollar Brain was filmed as Billion Dollar Brain in 1967, the third installment of the Harry Palmer series of films based on Deighton's novels, featuring Michael Caine; it was a commercial flop. Billion-Dollar Brain Billion-Dollar Brain is a 1966 Cold War spy novel by Len Deighton. It was the fourth to feature an unnamed secret agent working for the British WOOC(P) intelligence agency. It follows "The IPCRESS File" (1962), "Horse Under Water" (1963), and "Funeral in Berlin" (1964). As in most of the author's novels, the plot of "Billion-Dollar Brain" (1967) is intricate, with many dead ends. The unnamed protagonist is ordered
The Ipcress File (film) by men impersonating Palmer and Carswell. Suspecting that Radcliffe is being held in a certain disused factory, Palmer orders a search, but nothing is found except a piece of audiotape marked "IPCRESS" that produces meaningless noise when played. Dalby then points out that the paper on which Grantby had written a false phone number is the programme for an upcoming military band concert. There they encounter Grantby and a deal is struck for Radcliffe's return. The exchange goes as planned but, as they are leaving, Palmer shoots a man in the shadows who turns out to be a CIA agent.