Former London constable Nicholas Angel finds it difficult to adapt to his new assignment in the sleepy British village of Sandford. Not only does he miss the excitement of the big city, but he also has a well-meaning oaf for a partner. However, when a series of grisly accidents rocks Sandford, Angel smells something rotten in the idyllic village.

A woman desperate to boost her social media score hits the jackpot when she's invited to a swanky wedding. But the trip doesn't go as planned.

Blackmail threatens the monarchy and Sherlock is about to meet the woman who beats him.

In a mysterious and remote snowy outpost, Matt and Potter share a Christmas meal together, swapping creepy tales of their earlier lives in the outside world.

After learning about a new service that lets people stay in touch with the deceased, a lonely, grieving Martha reconnects with her late lover.

Over the last ten years, technology has transformed almost every aspect of our lives before we've had time to stop and question it. In every home; on every desk; in every palm - a plasma screen; a monitor; a smartphone - a black mirror of our 21st Century existence.