★★★½ 56 UP The latest installment of this groundbreaking documentary series represents a bit of a holding pattern. The 13 British men and women who have been filmed at seven-year-intervals since they were 7 are now between middle age and old age, and they want us to know they’re not dead yet. Essential viewing nonetheless. (144 min., unrated) (Ty Burr)
★ Identity Thief All the good will Melissa McCarthy earned from “Bridesmaids” is undone in an obnoxious comedy made worse by obnoxious sentimentality. She’s a credit-card-fraud artist, Jason Bateman is her uptight victim, and the two hit the road together. Unfunny, vulgar, predictable, it’s the generic equivalent of a Judd Apatow movie. (108 min., R) (Ty Burr)
★★★ Side Effects A sleekly clever murder mystery that plays as many games with the audience as it does with its characters. Rooney Mara and Channing Tatum play a married couple, Catherine Zeta-Jones and Jude Law play psychiatrists, somebody ends up dead. In the end, though, it’s just a genre exercise and evidence that director Steven Soderbergh is getting bored. (106 min., R) (Ty Burr)
★★ Bullet to the Head Sylvester Stallone is surprisingly funny playing an irascible hit man paired with a cop (Sung Kang). It’s a trick Stallone pulls off by not trying too hard, and generally just looking annoyed to be here. (92 min., R) (Tom Russo)
★★★ Warm Bodies A zombie date flick that has its “Twilight” and makes fun of it too, thanks to a cheeky screenplay and tart direction by Jonathan Levine. Nicholas Hoult and Teresa Palmer play a zombie lad and a living girl who fall for each other after the apocalypse. It’s silly, often funny, and surprisingly sweet. (97 min., PG-13) (Ty Burr)Find an archive of reviews at www.boston.com/movies.