While you're waiting for Benedict Cumberbatch and Martin Freeman to return to your TV screens in 2014 you may as well catch up with Jonny Lee Miller and Lucy Liu. Tonight Mycroft asks his brother to return with him to London as his stint in New York comes to an end. While pondering the offer, Sherlock looks into the murder of a beautiful young woman with a curious link to a billionaire CEO, but as new evidence moves the investigation in a surprising direction, he and Watson become entangled in a messy marital dispute.