HBO | 7:45 pm
Although it proved to be a box-office disappointment, writer-director Joe Cornish's 2019 British-American fantasy earned mostly very warm reviews during its brief theatrical release. Louis Ashbourne Serkis (son of actor Andy Serkis) stars as 12-year-old Alex, who is struggling with bullies and other familiar adolescent woes when he stumbles across an old sword at a construction site. The blade turns out to be Excalibur, King Arthur's legendary weapon, and Alex is destined to protect the world from Morgana (Rebecca Ferguson), an evil enchantress. Patrick Stewart also stars.