Saturday 22 April
7.20pm-8.10pm
BBC ONE

Smile. Written by Frank Cottrell Boyce and directed by Lawrence Gough.
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 trying to unravel a terrifying mystery…

The Doctor is played by Peter Capaldi, Bill by Pearl Mackie and Nardole by Matt Lucas