Erik Skjoldbjaerg, director of the 1997 thriller Insomnia – which had an English-language remake by Christopher Nolan – has now given us a real oddity, based on a true story that should surely have been told more directly in documentary form and not as a souped-up and often absurd Norwegian conspiracy thriller: a sort of gloomy, jumper-wearing Silkwood. In the 1980s, the Norwegian government collaborated with American diving firms to investigate how they could lay pipelines at great depths to get the North Sea oil ashore. The plan made modern Norway a wealthy oil producer. But who got hurt along the way? Did unscrupulous US corporate types sacrifice divers while Norwegian politicians looked the other way? Aksel Hennie plays Petter, a diver who discovers something murky; Wes Bentley plays Mike, a diver who may or may not be a bad guy (it really isn't clear) and America's greedy head honcho Ferris is played by Stephen Lang, the barrel-chested colonel in James Cameron's Avatar. In fact, some of the diving scenes do have a Cameronian look to them. A strange picture: unusual, but bafflingly plotted and paced and, frankly, tedious.