I also strongly suspect you watched "The Spy Who Came in From the Cold". If you enjoyed this movie and the way it is narrated, please do yourself a favor and watch all the BBC mini series from the 70ies/80ies based on John Le Carré books, namely "Tinker Tailor Soldier Spy", "Smiley's People", and "A Perfect Spy" (or read the books, John Le Carré is an excellent writer, and "A Perfect Spy" can be compared to works by Dickens). You usually have no clue what is going on, and only learn about it later.