1. 2001: A Space Odyssey (1968)

The greatest film ever made began with the meeting of two brilliant minds: Stanley Kubrick and sci-fi seer Arthur C Clarke. ‘I understand he’s a nut who lives in a tree in India somewhere,’ noted Kubrick when Clarke’s name came up – along with those of Isaac Asimov, Robert A Heinlein and Ray Bradbury – as a possible writer for his planned sci-fi epic. Clarke was actually living in Ceylon (not in India, or a tree), but the pair met, hit it off, and forged a story of technological progress and disaster (hello, HAL) that’s steeped in humanity, in all its brilliance, weakness, courage and mad ambition. An audience of stoners, wowed by its eye-candy Star Gate sequence and pioneering visuals, adopted it as a pet movie. Were it not for them, 2001 might have faded into obscurity, but it’s hard to imagine it would have stayed there. Kubrick’s frighteningly clinical vision of the future – AI and all – still feels prophetic, more than 50 years on.