Series: 10
Original Air date: April 22, 2017
Number Doctor: 12th
Companion(s): Bill Potts and Nardole
Writer(s): Frank Cottrell-Boyce
Director(s): Lawrence Gough
Guest Stars:
Kiran L. Dadlani as Kezzia
Mina Anwar as Goodthing
Kaizer Akhtar as Praiseworthy
Ralf Little as Steadfast
Kalungi Ssebandeke as Nate
Synopsis: In the far future, at the edge of the galaxy, there is a gleaming, perfect city. This brand new human settlement is said to hold the secret of human happiness – but the only smiles the Doctor and Bill can find are on a pile of grinning skulls. Something is alive in the walls, and the emojibots are watching from the shadows, as the Doctor and Bill try to unravel a terrifying mystery.