Gatiss also talked about “The Abominable Bride” Christmas special that Season 4 will be heavier compared to the previous season. He recalled that the first two episodes of Season 3 were light-hearted because they knew that they were going to shoot Magnusson, and they wanted to make it the best times for the three of them as a new team so that they would really have a great time.
There are also reports saying that British actor Tom Hiddleston will take on the role of the third Holmes brother, which means that he will be a sibling to Benedict Cumberbatch’s Sherlock and older brother Mycroft, played by Mark Gatiss himself.
Hiddleston shall reportedly play Sherrinford, according to both Mark Gatiss and co-creator Steven Moffat.
However, the showrunners expressed apprehension on whether they could get Hiddleston to commit to “Sherlock” since he is such a very busy actor these days. The actor is reportedly doing two movies including “The Night Manager,” and “Kong: Skull Island.” There are even reports saying that he is vying to become the next James Bond with the decision of Daniel Craig to give up the role after “Spectre” shown in November last year.