This international thriller is set at the height of the Cold War years of the mid-20th Century. George Smiley, a disgraced British spy, is rehired in secret by his government - which fears that the British Secret Intelligence Service, a.k.a. MI6, has been compromised by a double agent working for the Soviets.
Ultimately, though, it is very much Oldman's film, thanks to a restrained tour de force performance. Smiley is weathered, worn and beaten down by life, but he's also a quiet, sure force of something that resembles good.
For all those that look at the films of the golden age and chide that "they don't make them that way anymore", here's a fine example that a film can be fresh, intelligent, drawing from the past while carving out its own unique and very contemporary vision