Written by Chris Chibnall
"I eat danger for breakfast. I don’t, I prefer cereal. Or croissants. Or those little fried Portuguese–never mind, it's not important."
| Episode Title | Premiere Date |
| Arachnids in the UK | 28/10/2018 |
“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.
| Character | Cast |
| The Doctor | Jodie Whittaker |
| Graham O'Brien | Bradley Walsh |
| Ryan Sinclair | Tosin Cole |
| Yasmin Khan | Mandip Gill |
| Robertson | Chris Noth |
| Grace O'Brien | Sharon D Clarke |
| Najia Khan | Shobna Gulati |
| Dr Jade McIntyre | Tanya Fear |
| Hakim Khan | Ravin J Ganatra |
| Sonya Khan | Bhavnisha Parmar |
| Frankie Ellish | Jaleh Alp |
| Kevin | William Meredith |
| Role | Crew |
| Writer | Chris Chibnall |
| Director | Sallie Aprahamian |
| Producer | Alex Mercer |
| Series Producer | Nikki Wilson |
| Executive Producer | Matt Strevens |
| Executive Producer | Chris Chibnall |
