Billion Dollar Brain is a 1967 British espionage film directed by Ken Russell and based on the 1966 novel of the same name by Len Deighton. The film features Michael Caine as secret agent Harry Palmer, the anti-hero protagonist. The "brain" of the title is a sophisticated computer with which an anti-communist organisation controls its worldwide anti-Soviet spy network. Billion Dollar Brain is the third of the Harry Palmer film series, preceded by The Ipcress File (1965) and Funeral in Berlin (1966). It is the only film in which Ken Russell worked as a mainstream 'director-for-hire', and the last film of Françoise Dorléac. A fourth film in the series, an adaptation of Horse Under Water, also to be released by United Artists, was tentatively planned but never made. Caine played Palmer in two later films, Bullet to Beijing and Midnight in Saint Petersburg. Plot Harry Palmer, who has left MI5 to work as a private investigator, is told by a mechanical voice on the phone to take a package to Helsinki. The package contains six virus-laden eggs that have been stolen from the British government's research facility at Porton Down. In Helsinki, he is met by Anya, who takes him to meet her handler, Harry's old friend Leo Newbigen. Leo is in love with Anya, but Harry sees that she is only pretending to reciprocate. After determining that he cannot trust either Leo or Anya, Harry is abducted by his former MI5 superior, Colonel Ross, who coerces him into working once more for the British government in pursuing the conspiracy and getting the eggs back. Leo takes Harry to a secret room where a computer issues daily instructions to the local team, speaking in the same voice that summoned Harry to Helsinki. The computer orders Leo to kill Anya, but he doesn't. All go to meet a scientist who assesses the value of the eggs and Harry is introduced as a new operator. Harry is ordered to Latvia, in the USSR, where he embeds with rebels to obtain intelligence. After being captured and left for dead, Harry is set free by Colonel Stok, an old acquaintance from the KGB. Back in Helsinki, Anya tries to kill Harry while seducing him, then confesses that the computer told her to kill him. Harry locks her in a room and waits for Leo at the computer. Leo offers to pay off Harry for