- Jodie Whittaker (The Doctor)
- Mandip Gill (Yasmin 'Yaz' Khan)
- John Bishop (Dan Lewis)
Episode: Praxeus
Air Date: 2020-02-02
Runtime: 50 min
The mysterious "Praxeus" will cause the quartet to split up (never a good idea) to investigate mysteries all over Earth. And what they find will threaten all human life (again).