- Jodie Whittaker (The Doctor)
- Mandip Gill (Yasmin 'Yaz' Khan)
- John Bishop (Dan Lewis)
Episode: Orphan 55
Air Date: 2020-01-12
Runtime: 47 min
The Doctor and her friends discover that the luxury resort where they are holidaying is hiding a number of deadly secrets. What are the ferocious monsters attacking Tranquillity Spa?