A code-breaking genius (Dougray Scott) is called back from sick leave to help break a code which may save the largest merchant ship convoy from attack by Nazi U-boats in the North Atlantic in 1943. At the same time he is desperate to find out what has happened to the woman (Saffron Burrows) with whom he had become obsessed, and enlists the help of her roommate (Kate Winslet). Also with Corin Redgrave, Tom Hollander, Nikolaj Coster-Waldau and Jeremy Northam. [1:57]

SEX/NUDITY 5 - A man and woman are shown in bed as they finish making love: he is bare-chested and she lies on top of him (we see her bare back to the hips and part of her side), there is a bit of rhythmic movement and she moans. We see a man's bare buttocks as he gets out of bed. A man and woman kiss passionately a couple of times, and a man and woman kiss romantically a few times. A woman kisses a man's thumb sensually after he pricks himself with a thorn. A man and woman dance. A woman wearing a short slip dances (we see this a few times) and we see her thigh, stocking tops, part of her bare buttock and cleavage. A woman wears dresses that expose her bare back, shoulders and cleavage. A woman says of her roommate: "she hasn't been sleeping at home," a man says "women start dropping their drawers" (during a war), and a man talks about "utility nickers; one pull and they're off." A man admires a woman's leg.

VIOLENCE/GORE 4 - We watch as a mass grave is uncovered (each time we visit the site there are more bodies uncovered) and we see the decaying bodies several times (we hear that there were 4000 Polish soldiers massacred by the Russian army; it is referred to as the Katyn Forest massacre). A dog digs in woods and uncovers a glove-covered hand. A torpedo is fired from a submarine and it hits a tanker that explodes. A bomb is dropped from a plane onto a submarine that has just surfaced and a man is clinging onto the outside; there's a large explosion, flames and debris are strewn around and the sub sinks. A man talks about many men having been killed when their ship was torpedoed at sea. A man talks about two men having died in a submarine. Evidence is found that suggests that a woman has been murdered and the police drag a nearby body of water searching for her body. Two men struggle and fight on a moving boat; one has a rope wrapped around his neck, the other has his hands around the other's throat, and one pulls a gun; shots are fired, and one is hit with a stick and is knocked overboard. A man is punched in the face and he falls back into a telephone booth (we hear that he has broken his cheekbone). A man and woman are chased by police, they swerve along a narrow road and nearly hit a tanker truck (the police car runs off the road to avoid the truck). We see a man who has been badly burned and has a scarred face with an eye patch throughout the movie. A woman threatens a man with a poker. A man ransacks a woman's room in a rage. A man and woman struggle and argue over a piece of paper. There are some veiled threats. There is some newsreel footage of bombers dropping bombs. We hear a man urinating.

LANGUAGE 5 - 4 F-words, 3 scatological terms, 1 anatomical term, 14 mild obscenities, 1 religious profanity, 11 religious exclamations and some name-calling.

SUBSTANCE USE - People are shown smoking cigarettes. And, a bottle of alcohol is awarded as a prize for breaking a code.

DISCUSSION TOPICS - WWII, war atrocities and massacres, obsession, mental breakdowns, jealousy, betrayal.

MESSAGE - Sometimes we must sacrifice for the greater good.