James Cameron is a filmmaker who has really pushed the boundaries of what is possible on screen. From re-creating the Titanic to the alien world of Pandora, his films are events. He obsesses over them for years, even decades. February 4 sees the release of Sanctum, executive produced by Cameron, as using the revolutionary underwater cameras and 3D technology to tell an unbearably tense tale of cave divers in peril. To mark its release, we look down the man’s career to date.