Been watching some oldies but goodies lately (my own collection)
The IPCRESS File (1965): 7/10 - Michael Caine. In London, a counter espionage Agent deals with his own bureaucracy while investigating the kidnapping and brainwashing of British scientists.
This is a slow burner psychological thriller from the pen of Len Deighton. A bit dated now but still enjoyable.
The Odessa File (1974): 7/10 - Jon Voight & Maximilian Schell. Following the suicide of an elderly Jewish man, a journalist in possession of the man's diary investigates the alleged sighting of a former S.S. Captain, who commanded a concentration camp during World War II.
Based on the novel by Frederick Forsyth (which I have some where). These type of hunt the NAZI thrillers were all the rage in the sixties and seventies. This is certainly one of the better ones.