Amnesiac Dylan O'Brian emerges from a lift shaft in the ground to be found by a group of lads who've all been left to live a sort of subsistence existence inside a whopping great stone maze. A quick bout of wrestling with "Gally" (Will Poulter) reminds him that his name is "Thomas" but that still doesn't help him - or anyone else - with what he's doing here. Each day the great doors of the maze open up, but anyone who does try to make it out is never heard from again. The lads are completely clueless until a girl is sent amongst them, and she "Teresa" (Kaya Scodelario) might just have the answer as "Thomas" manages to galvanise a few of his pals to test the secrets of the maze. Can they escape, and if they do - what are they escaping too? Is it freedom or might it actually be worse? They do know that the maze is being patrolled by some menacing metal monsters so it's quite a dangerous leap of faith they must take - but it's either that or staying put. This is clearly part one of a franchise, so much of it is simply character establishment with some ground rules laid down for them and us. A reliable cast of associates help keep the film story and the characters develop well enough - though quite why Londoner Poulter had to have an American accent is anyone's guess. The Dashner novels upon which this is based follow a familiar line, but director Wes Ball tries to keep the film moving along quickly with plenty of moments of peril, acrobatics and using a star whom the camera likes and who energetically enters into the spirit of this adventure. It's enjoyable fayre - you'll never remember who was who afterwards, but these sort of franchises were all the rage in the mid-noughties, and this is perfectly watchable and occasionally exciting brain fodder.