Benedict Cumberbatch Confirms "Sherlock: Series 4"

Even though filming on the third series of "Sherlock" has just began, Benedict Cumberbatch confirmed that a series 4 has already been commissioned and he commented that further series could be possible. Even though Martin Freeman is tied down with "The Hobbit" franchise, he's still got time to film a wee BBC drama........FANTASTIC!!! 
Here's what Sherlock Holmes himself said,

"We've agreed to two more series but I could get into trouble for saying that. All I know at the moment is I'm doing these three [episodes of the upcoming series] and another three. It just depends on Martin and I's availability, how long we can keep it going. It depends on Steven's ability. I'd love to keep it going."