Common Sense Note
Parents need to know that Snowpiercer is a post-apocalyptic sci-fi movie with frequent brutal fighting and violence: There's shooting, spurting blood, guns, knives, axes, and a scene of torture in which a character's arm is frozen and shattered. The body count is very high and includes important/key characters. Strong language includes a few uses of "f--k" and "s--t" (once uttered by a little girl), as well as "a--hole," "bitch," and "bastard." Characters are seemingly addicted to a fictitious drug called Kronol, and a character's carefully saved cigarettes are smoked lovingly at key moments in the story. The material is dark, with intense themes about the behavior of humans in particular and society in general. But even though it takes a pretty bleak view of humanity, the movie (which stars Captain America's Chris Evans) still has some admirable characters who take leadership positions, prove their strength, and work together to fight difficult odds.
Some bathing suit-clad women are briefly seen lounging in hot tubs and pools.
Very brutal and bloody. Guards beat up an old woman and take children away from their parents. Many characters are violently beaten or shot during many assorted fights, brawls, and battles. Some are executed point blank; key characters die, and the overall body count is high. Characters fight with axes, knives, guns, and other weapons. Blood is shown dribbling and spurting. A man's arm is shoved through a hole in the train; after a few minutes, it freezes solid, and the bad guys shatter it. There's a gross-out scene involving some bugs. Children are shown to be brainwashed in a "school" car, and other children are forced to be laborers. Some disturbing dialogue about cannibalism. There's a huge crash.
"F--k" and its various permutations are used a few times, plus "s--t," "a--hole," "bitch," "bastards," "damn," "crap," and English slang like "shite."
The train is set up like a miniature country, where certain numbers of people are kept in poverty simply to keep the economy and resources in balance; the poor people could be helped, but they aren't. One character learns to be a leader, even though he doesn't necessarily believe in himself at first. And a secondary character thinks outside the box, literally. He dreams of escaping the entire system and starting afresh; the two characters have different solutions to the problem of poverty and repression.
Drugs / Tobacco /
Characters are highly addicted to a fictitious drug called "Kronol," which one character describes as "industrial waste." Chunks of Kronol are stolen and used as bargaining chips. A character has saved two cigarettes, and they're smoked at various points, with characters eagerly savoring every deep drag. Characters are seen sipping wine and champagne in a background way.