The Fourth Protocol | 1987
The Fourth Protocol is a top secret agreement between the United States, Great Britain, and Russia to stop smuggling nuclear weapons. But some rogue spies are intent on defying the agreement and destroying NATO in the process. British agent John Preston begins to notice nuclear weapons components coming into the country and is suspicious, but he can't convince his superiors, who assume he is simply displaying Cold War anti-communist paranoia. So Preston starts collecting clues to solve the mystery of who is attempting to break the Fourth Protocol.