‘Sherlock’ Season 4 Spoilers, News And Updates: Will This Be The Show’s Last Season? Spin-Off Movie To Star Will Ferrell As Sherlock?

'Sherlock' Season 4 Casts Tom Hiddleston As Sherrinford Holmes? Benedict Cumberbatch Reacts To Rumor

'Sherlock' Season 4 Updates: Benedict Cumberbatch, Steven Moffat Confess Upcoming Season Could Be The Last; Season 4 Release Date Confirmed

'Sherlock' Season 4 News & Updates: Benedict Cumberbatch Addresses Rumors About Series Ending; More Installments Possible After Season 4