- Jodie Whittaker (The Doctor)
- Mandip Gill (Yasmin 'Yaz' Khan)
- John Bishop (Dan Lewis)
Episode: Dark Water (1)
Air Date: 2014-11-01
Runtime: 46 min
In the mysterious world of the Nethersphere, plans have been drawn. Old friends and old enemies manoeuvre around The Doctor, and an impossible choice is looming over him.