There's a mole, right at the top of the Circus. And he's been there for years.

Tinker, Tailor, Soldier, Spy (2011)

Chosen by me because I like to go to the cinema a lot.

This is a curious one. A very strong film, with a great cast, compelling eye (and ear - some of the song choices are terrific) for detail, distinctive, well paced and fascinating.
But is has a huge central problem. It's just a problem that doesn't especially bother me.
It is massively underwhelmed by it's own mystery. Everyone keeps talking about it but the film itself doesn't seem to care who the mole is. When the solution comes it is very arbitrary (there are no real clues, it could be any of the suspects and the movie wouldn't change at all) and has some leaps in logic that seem confusing (Smiley approaches one of the suspects because he knows it's not him, but the movie never explains how he knows it's not him), the actual moles motives are tossed away in a line that on examination actually tells us nothing.
Perhaps because the film is so confidant in it's cast and tone this manages not to annoy me in the slightest but I could understand if people came out of this one unsatisfied.