Doctor Who: The Bells of Saint John

The bowtie-wearing Time Lord finds himself in modern-day London in his search for Clara Oswald, the mysterious, souffle-baking woman who keeps dying. But there's a problem. Something dangerous is lurking in the city's wi-fi signals, uploading people's minds and imprisoning them - and among those targeted is none other than the woman he has travelled halfway across the galaxy to find. Matt Smith stars, with Jenna-Louise Coleman making her first official appearance as new companion Clara (having played ill-fated variations of the character in two previous episodes) and Celia Imrie