9 - Excellent

Rating: 9/10 (5 May 2016)

Don't let the fact that this is an old black and white movie dissuade you. If you give it a chance, it will captivate you more than most modern movies. Sometimes less is more. With a low budget and a simple premise, strong acting, sharp directing and flawless writing really make this gem come together into something special.
It respects your intelligence enough to let you slowly piece together the evidence, and throughout the movie you'll see the gradual change in all of the characters. And with just the characters and a room, it feels like all twelve of them are fleshed out and believable. It's an essential watch for anyone who likes psychologically engaging movies.