The Doctor takes Clara and the children she babysits to a rundown amusement park in space where Cybermen are hiding, and ready to invade the most precious place in the universe, The Doctor's mind.
Episode rating
Cast of episode
- The Doctor
- Clara
- Angie
- Artie
- Webley
- Porridge
- Captain
- Beauty
- Brains
- Ha-Ha
- Missy
- Zygon
- Daleks
- Soldier
- Cyberman
- Cyberman
- U.N.I.T. Soldier
- Big Red