If you’ve seen Bong Joon-ho’s splendid monster movie The Host, you already want to see Snowpiercer. If you haven’t seen a Bong Joon-ho movie, you’re about to meet one of your favorite directors in the whole world. Snowpiercer’s premise sounds totally insane: In a new ice age, the last humans circle the globe on a super-train on which the wealthy few live in luxury and the masses live in filth. But Bong Joon-ho’s directorial brilliance is undeniable, and a stellar cast—Alison Pill, Ed Harris, Chris Evans, and most especially Tilda Swinton—elevate Snowpiercer to sci-fi classic status. (SIFF Cinema Uptown, 511 Queen Anne Ave N, siff.net, showtimes TBA)