Despite all its noise and bluster, this big-budget blockbuster is actually a rather slight dystopian sci-fi thriller. And with a running time of around 90 minutes, it's disarmingly brief compared to similarly themed epics like Blade Runner or The Fifth Element, which it is blatantly trying to emulate. Vin Diesel plays Toorop, a bounty hunter with a heart who accepts "one last job". He must escort a young psychic (Mélanie Thierry) and her kung fu nun chaperone (Michelle Yeoh) from a post-nuclear meltdown Russia to the relatively safe haven of a gentrified New York. This flimsy, no-questions-asked pretext basically accommodates a series of high-kicking, bone-crunching set pieces as opposing outside forces intervene, including a megalomaniacal religious cult run by Charlotte Rampling. There are explosive car chases - including one across the frozen wastes of Alaska on snowmobiles - and some fashionable parkour, but despite moments of flimsy philosophical meditation (not the statuesque Diesel's strong suit), Babylon AD only really works as mindless entertainment.