Series 4 Episode 1 : The Six Thatchers
Airing on BBC one and PBS on January 8th.
Possible Spoilers ahead
The detective faces a dangerous new enemy in the seemingly unassailable Culverton Smith, a man whose position of power conceals a terrible secret. Estranged from John, Sherlock must confront his demons to defeat his enemy's plans. Toby Jones guest stars as the villain alongside Benedict Cumberbatch and Martin Freeman.