DRAMA Frank Cottrell-Boyce is a name to make one's antennae twitch. An award-winning author, he's a long-time colleague of Danny Boyle and wrote the inspiring 2012 Olympics Opening Ceremony. His previous Who in 2014 saw our planet blanketed overnight by forest, in a barmy but poetic fable paying homage to William Blake. It was not a resounding success.

For his second twirl of the Tardis, he's consorted with rather more reliable visionaries, science experts with concerns about artificial intelligence, and has predicted a future that isn't as utopian as it first seems. Smile is set on a colony world whose settlers "have cracked the secret of human happiness". Only there's no sign of any people when the Time Lord and Bill explore the pristine architecture (in reality, Valencia's ultra-modern City of Arts and Sciences).

Lethal microbots (Vardies) swarm in the sky and dinky robots with emoji faces patrol the walkways - and woe betide you if don't smiley-face back. Science has failed this civilisation and the new world has become a death trap. Smile reads like a cautionary tale, is packed with clever ideas and beautiful vistas, yet it lacks energy and, ultimately, is less  and more .