- Jodie Whittaker (The Doctor)
- Mandip Gill (Yasmin 'Yaz' Khan)
- John Bishop (Dan Lewis)
Episode: The End of Time (1)
Air Date: 2009-12-25
Runtime: 60 min
Facing his mortality, the Doctor returns to Earth find the planet's population haunted by horrific nightmares all their own. Reuniting with Wilf, The Doctor investigates a lingering mystery that threatens to unravel the planet as an old enemy prepares to be reborn.