WARNING: Embargoed for publication until 00:00:01 on 10/01/2017 – Programme Name: Sherlock – TX: 15/01/2017 – Episode: Sherlock S4 – Ep3 (No. 3) – Picture Shows: **STRICTLY EMBARGOED UNTIL 10TH JANUARY 2017** Mycroft Holmes (MARK GATISS) – (C) Hartswood Films – Photographer: Joss Barrett