Charles Bronson is KGB, man! And Lee Remick is a double agent! And together they have to track down KGBer-gone-commando Donald Pleasence, as he reactivates a long-since-abandoned plan to activate sleeper agents in the U.S. and have them blow up a bunch of stuff. This Cold War thriller may not have the most complicated story, but it's curiously effective and has been been surprisingly influential, a nice companion piece to The Manchurian Candidate, another mind controlled-civilians-as-assassins story. Bronson probably does less fighting in this film than in any other film in his career.