With great North-American actors and with a well written plot based on actual events, this movie carries you into the belly of an old Diesel Submarine, Russian Submarine, at the height of the cold war. When you think that the world during the Cuban Missile Crisis was on the brick of nuclear war just for a few yards, well, during this crisis, depicted by this movie, the world was only just a few inches away from nuclear devastation. Ed Harris leads the cast of North-American actors, and when I saw it, I didn't expect to be hearing North-American actors' speaking Russian; if production could have cast Russian actors? Sure, but I'm glad they didn't, this cast doesn't need any justification. A solid 7: it will entertain you with a great plot and quite a few well played action scenes; it will make you think, so, a little bit of brain cells are needed.
