The Quiller Memorandum [1966] [DVD]

An early James Bond imitator, although the hero never uses a gun. After the brutal murder of two British agents in Berlin, secret agent Quiller (George Segal) is assigned by his boss Pol (Alec Guiness) to West Berlin where he must uncover the operations of the mysterious neo-Nazi organisation believed responsible for the murders. He is kidnapped by the group, after a night with a beautiful teacher, but later set free in the hope that he will lead them to his superior.