Intriguing sci-fi thriller stars Sheen as a brilliant but paranoid astronomer whose obsession with discovering intelligent life puts him at odds with his neglected girlfriend. He discovers a strange signal from outer space, but is fired when he tries to make it public. Taking matters into his own hands, he stumbles upon the existence of aliens that've already invaded the Earth and are using a sophisticated technological scheme to try and take it over. Brainy thriller abandons guns, explosions, and car chases in favor of actual science and clever plotting. Starts slow, but only gets more and more interesting as it goes along, with an effectively edgy performance from Sheen that's right on target. ***