Arachnids in the UK

"Arachnids in the UK" is the fourth episode of the eleventh series of the British science fiction television programme Doctor Who. It was written by showrunner and executive producer Chris Chibnall, directed by Sallie Aprahamian, and first broadcast on BBC One on 28 October 2018.

In the episode, alien time traveller the Doctor (Jodie Whittaker) brings her human friends – Graham O'Brien (Bradley Walsh), Ryan Sinclair (Tosin Cole), and Yasmin Khan (Mandip Gill) – back to Sheffield, where they discover a serious problem is roaming around the city in the form of giant spiders. Sharon D. Clarke reprised her role as Grace O'Brien in vision form. This episode also featured the first appearance of Chris Noth as Jack Robertson who would later become a recurring character.

It was watched by 8.22 million viewers and received generally positive reviews from critics.