The trailer for Doctor Who Series 11 Episode 4: Arachnids in the UK. 'Something's happening with the spiders in this city.' The Doctor, Yaz, Graham and Ryan find their way back to Yorkshire - and Yaz's family - only to find something is stirring amidst the eight-legged arachnid population of Sheffield. Guest starring Chris Noth and Shobna Gulati. Written by Chris Chibnall. Directed by Sallie Aprahamian.