Inside No 9, The Riddle Of The Sphinx

A family spending Christmas in an Austrian chalet are warned of a terrible monster that comes to punish the wicked.

The small matter of which of a group of friends should pay a restaurant bill quickly escalates into something much more serious and deceitful. Jason Watkins stars.

Nina thinks Professor Squires has all the answers when, actually, neither has a clue what the future holds. With deadly intent, they commence a battle of wits.

Roger's promotion involves a full-on, old-school karaoke session, which leads to an evening of hopes, dreams, intrigue, romance, betrayal and an awful lot of singing.

A couple's world is changed forever by the seemingly chance find in a local street of a single black shoe, as the new arrival becomes a life-changing obsession.

A group of individuals are at an art gallery for champagne, canapes and cutting-edge culture - but realise they are trapped within the exhibition.