Important New Season
"Sherlock" Season 4 will become very pivotal for the entire franchise as a lot of previous characters will return along with a possible love interest for the main protagonist. Fans are curious as to who this love interest might be as Sherlock's last romantic partner, Irene Adler, appeared two seasons ago. They continue to question if Adler might also be part of the rumored characters to return this season.
While there has yet to be any official release date for the series, "Sherlock" Season 4 is expected to hit the small screens this January 2017.Source