Series 4 of Sherlock continues with the second episode entitled “The Lying Detective“, premiering 8 January 2017 at 9pm to 10.30pm on BBC1.

Synopsis:

In episode two of this new series, written by Steven Moffat, Sherlock faces perhaps the most chilling enemy of his long career: the powerful and seemingly unassailable Culverton Smith – a man with a very dark secret indeed.

Benedict Cumberbatch returns as Sherlock Holmes, with Martin Freeman as John Watson, Mark Gatiss as Mycroft, Rupert Graves as Inspector Lestrade, Una Stubbs as Mrs Hudson, Amanda Abbington as Mary Watson, Louise Brealey as Molly Hooper and Toby Jones as Culverton Smith.