Doctor Who: Arachnids in the UK

"Arachnids in the UK" is the fourth episode of season eleven of the relaunch of the British science fiction television series Doctor Who, which is also season thirty-seven of the entire franchise. It is the 851st episode of the entire series overall. The episode was directed by Sallie Aprahamian with a teleplay written by Chris Chibnall. It first aired on BBC America on Sunday, October 28th, 2018.