We can't wait to see Sherlock and Watson in the new season, but until that time check out some other exciting details below:

　　We know who is returning for season four - So far, the confirmed cast includes leads Benedict Cumberbatch and Martin Freeman and regulars Amanda Abbington as Mary Watson, Louise Brealey as Molly Hooper and Jonathan Aris as Anderson。

　　Season four will be darker - Moffat spoke with Entertainment Weekly saying the production team wants to take the "Sherlock" series somewhere its never been in previous seasons。During the "Sherlock" panel at SDCC '15 Moffat talked more about the darker tone of season four saying。"We've got a clear idea of what we're going to do and it's going to be a clear shift in tone," Moffat said。

　　Irene Adler may return! - iDigital Times reports that Irene (Lara Pulver) may return to "Sherlock" for season four. If you don't remember Irene she was a love interest to Sherlock and much more than that during the early season。

　　Janine Returns! - Another love interest of Sherlock's and Mary's close friend, Janine will return for the upcoming season. According to Moffat she will definitely be back and her and Sherlock will be friends。

　　Moriarty is not Alive! - Moffat said early on that Moriarty is indeed dead and not coming back. The writer said "He shot himself in the face. What more do you want?

　　Future seasons are already planned! - Moffat told the Guardian that He and Mark already planned ahead for more seasons saying, "Rather excitingly, Mark and I, for no particular reason, we just got out of the rain… and we just started plotting out what we could do in the future." He also added that there was no plan for a movie as each episode is a feature length itself。

（编辑：何莹莹）