After ‘Skyline’ and ‘Battle: LA’, does the world really need another high- concept, low-rent, alien-invasion movie? Russian-US co-production ‘The Darkest Hour’ attempts to shake things up by sending its fresh-faced American cast off to Moscow, just in time to face a plague of wispy, ethereal energy spheres from space, bent on sapping our precious natural resources. But there’s literally nothing here that works: the SFX are limp, the acting is dire and director Chris Gorak seems to be fighting a losing battle with the concept of narrative logic. Worst of all is the appalling script: try taking a shot of whisky every time a character states the bleeding obvious (‘They killed them all!’, ‘They’re coming this way!’). It might be the only way to make it through this slack, senseless sci-fi snoozer.