Writer-director Neill Blomkamp follows up his stunning breakout District 9 with another nasty, gritty sci-fi actioner that aims to incorporate social commentary into the mix. Elysium explores a future in which the huddled masses scurry about on the Earth’s surface (imagine a global third world) while the wealthy reside on an immaculate space station with no health and safety concerns. A legendary ex-con (Matt Damon) seeking to stay on the straight and narrow path enlists in a last-ditch effort to stage an assault on the off-world retreat, but the nefarious security chief (Jodie Foster) dispatches Kruger (Sharlto Copley), her one-man wrecking crew/cleaner. As a late season release, Elysium could rally the troops and salvage what feels like a less than stellar summer at the multiplexes. Now in theaters. (R) Not screened in time for review.