\u201cTHE PURGE,\u201d Ethan Hawke, Lena Headey. A very promising B-movie premise becomes something of an afterthought in this gripping but somewhat underdeveloped thriller from writer-director James DeMonaco (\u201cLittle New York\u201d), which presents an America that devotes one day a year to the titular event, a twelve hour span on time in which any and all crime is legalized, with no emergency services available. Rather than focusing on the multitude of entertaining possibilities inherent in such a situation, DeMonaco chooses to focus on one family, led by security alarm salesman Hawke, whose impenetrable fortress of a home is beset upon by masked maniacs. While \u201cThe Purge\u201d has tension to spare and proves to be a better than average home invasion thriller, the insular approach is something of a letdown in the face of such a gutsy premise. Perhaps the upcoming sequel will capitalize better on its plot device, but in the meantime, \u201cThe Purge\u201d is a skillful thriller in its own right taken on its own modest terms. Rated R. Running time: 1:25. Suggested retail price: $29.98; Blu-ray $34.98.<\/p>\n
\u201cAFTER EARTH,\u201d Jaden Smith, Will Smith. Another troubled yet intriguing sci-fi offering from one of cinema\u2019s most notorious problem children, M. Night Shyamalan (\u201cThe Happening\u201d). He teams up with the most famous Smiths in the world to deliver this visually impressive but narratively perplexing futuristic fable, which following young Kitai (Jaden) as he traverses the unfriendly terrain of the now polluted and uninhabitable Earth after crash-landing there with his seriously injured father, Cypher (Will). There\u2019s of course chemistry between real life father and son, and the special effects are often quite creative and something to behold, but Shyamalan attempts to cram so much information and backstory into a relatively brief running time that the overall effect is dizzying. Still, \u201cAfter Earth\u201d is worth a look for the effects alone, and as ever there\u2019s the sense, however faint, that Shyamalan\u2019s seemingly off-kilter works may merit re-evaluation down the road a bit. Special features include an alternate opening sequence. Rated PG-13. Running time: 1:40. Suggested retail price: $30.99; Blu-ray $35.99.