Simon Morris looks at three films about stories - one based on an early tale of chivalry, one that smuggles adult concerns into a children's animated movie, and a horror film that taps into indigenous American myths and legends. The Green Knight tells one of the earliest recorded stories of King Arthur and his nephew Gawain 's perilous quest. Features Dev Patel (Slumdog Millionaire) and Alicia Vikander (Ex machina), directed by David Lowery (Pete's Dragon). Ron's gone wrong is an animated feature about what happens when Barney finally gets his coveted B*Bot, only to find it's a faulty version called Ron. Stars Zach Kalifianakis (The hangover) and Olivia Colman (The Crown). And Antlers tells the story of an Oregon teacher concerned about one of her pupils. What's Lucas got hidden at his home? Stars Keri Russell (Waitress) and Jesse Plemons (Power of the Dog). Produced by Guillermo del Toro.