Sherlock gets fourth season?

Sherlock star Benedict Cumberbatch possibly spilled a secret when he revealed he already signed for a fourth season of the BBC drama. At the moment they are still shooting season three. This third season will premiere this fall.

Cumberbatch said the following: "We've agreed to two more series but I could get into trouble for saying that". The biggest problem for the series to continue is not the demand, it's the availability for its actors, who have become quite the in-demand actors.