'Sherlock' news: showrunner Steven Moffat talks about the possibility of another season

Just like that, the long- and much-awaited "Sherlock" season 4 has already come to a close. After taking some time for viewers to wrap their heads around the convoluted plot line of "The Final Problem," conversations for a possible fifth season can finally be the next sole focus of the fandom.

Actually, rumblings about another outing for Sherlock Holmes (Benedict Cumberbatch) and John Watson (Martin Freeman) have already started long even before the recently wrapped season debuted. Production for season 4 has been tumultuous to say the least especially in terms of syncing everyone's schedule for principal photography.

With that in mind, "Sherlock's" recent finale ties up loose ends giving everyone a bit of a closure while leaving the door slightly open for a revisit should a re-order from BBC eventually happen.

"There isn't something we have to come back to address. Which is quite good for us. Because if we do come back, we can just start with a knock on the door and a new client, and they can go and investigate" showrunner Steven Moffat told Entertainment Weekly in a post-mortem session. "If we want to come back and solve more crimes we can do it, that's no problem. We're not allowed to end Sherlock Holmes," he added.

While there is some contention as to how the season finale was crafted, Moffat reveals that he is quite content with the ending. And should they no longer come back for a fifth season, he is adamant that he is happy with where they left both Holmes and Watson.

But say they do come back, especially with the amount of clamor the show generates, the TV boss teases what could possibly lie ahead for the dynamic duo. And it sounds that it will be quite full of character developments both for Holmes and Watson.

"They've grown up a bit and got older. If we ever make any more, it will be about two blokes in their mid-40s, which is the more traditional Sherlock Holmes," Moffat hinted. "It's sort of an extended origin story. We've always kept our version a bit ruder and less formed than the Jeremy Brett or Basil Rathbone versions — both of whom are a bit more gentlemanly and kinder."