All week

“The Purge” (Point, Eastgate, Star Cinema) — “Star Trek Into Darkness” was basically a remake of the classic Trek episode “Space Seed,” and now this horror-thriller lifts the premise from another Trek episode, “Return of the Archives.” (Will Landru make a cameo?) In the future, once a year there’s a 12-hour period where all crime is legal, and a family has to deal with a pack of murderous intruders. Festival!

“The Internship” (Point, Eastgate, Star Cinema) — My full review is here. “Wedding Crashers” Vince Vaughn and Owen Wilson reunite for this much tamer comedy about middle-aged guys who get an internship at Google.

“Kon-Tiki” (Sundance) — The incredible voyage of Thor Heyerdahl, across the ocean in a flimsy raft, is recounted in this adventure tale that played at the Wisconsin Film Festival.

“What Maisie Knew” (Sundance) — My full review is here. A wrenching custody battle between two self-centered New Yorkers is viewed through the eyes of their six-year-old daughter in this powerful drama.

Opens Wednesday

“This Is the End” (Point, Eastgate, Star Cinema) — Seth Rogen, James Franco, Danny McBride all play themselves, pampered Hollywood actors who realize the apocalypse is upon them.

Friday

“The Hellstrom Chronicle” (9:30 p.m., Madison Museum of Contemporary Art, 227 State St.) — MMOCA kicks off its Rooftop Cinema series with this 1970 film that mixes sci-fi and documentary footage to show how insects are fascinating, creepy creatures. The screening is free for museum members, $7 for everyone else. The good news of this unseasonably cool weather is that actual insects may not bother the audience during the screening.

Monday

“Star Trek II: The Wrath Of Khan” (9:30 p.m, Memorial Union Terrace, 800 Langdon St.) — The best of the “Star Trek” movies plays on the lakefront, as Kirk and Spock face off against the delightfully hammy Khan and his crew. Free!

Wednesday

“Raiders of the Lost Ark” (1:30 and 6:45 p.m., Sundance Cinemas) — Sundance’s Classics Series is devoted to Steven Spielberg in June, and the chance to see the original Indiana Jones adventure up on the big screen is what summer is all about. Plus the Rooftop Bar at Sundance is now open!