Impending Danger Closes in on Sherlock and His Friends in the Highly Anticipated Series 4 Premiere

The trailer for the upcoming, highly anticipated fourth series (season) of Sherlock strongly hints at the impending danger closing in on the eponymous character and all those around him. This includes the detective’s oft-reviled brother Mycroft, whom the normally accommodating Mrs. Hudson calls a “reptile”. Series 4 premieres on BBC One and on PBS (U.S.) on January 1st 2017.