Ko Sho Blo! Trigger-happy space police the Judoon are targeting 21st century Gloucester.
The Doctor, Yaz, Ryan and Graham race back to Earth in order to prevent them doing too much damage to the cathedral city.
But who are they looking for? And what did they do to incur the wrath of the Judoon?
- Jodie Whittaker as The Doctor
- Mandip Gill as Yaz
- Tosin Cole as Ryan
- Bradley Walsh as Graham
- Jo Martin as Ruth Clayton
- Ritu Arya as Gat
- Micahel Begley as All Ears Alan
- Neil Stuke as Lee Clayton
- Judith Street at Marcia
- Written by Vinay Patel and Chris Chibnall.
- Directed by Nida Manzoor.
Doctor Who continues Sunday 26th January at 7:10pm on BBC One