"The Fourth Protocol" is a solid conspiracy thriller starring Michael Caine as a British MI5 agent, John Preston. Preston catches wind of a false flag plot that a KGB agent is planning to carry out atomic attack on a U.S airbase located on British soil, which would effectively dissolve NATO.
There's not a whole lot to say about this film. If you like conspiracy/spy movies then this'll more than hit the mark. However, it does absolutely nothing to reinvent the genre and aside from a couple of neat set pieces, "The Fourth Protocol" is a fairly benign affair.
The film features an excellent performance from Pierce Brosnan as the KGB agent. He's an absolute cold-hearted bastard in this film and it's great, it's clear to see that this role would latter influence how he approached his early Bond performances.
Again, this is nothing spectacular but it makes for a fun, lazy Sunday afternoon flick.