Finally, the stars (and their schedules) have aligned and the BBC can finally bring us another season of Sherlock, a reuniting of Benedict Cumberbatch and Martin Freeman. Just last night, show EP Mark Gatiss (who also plays Mycroft) took to BBC show’s official Twitter page to announce the beginning of filming:

It’s been two full years (and a Victorian themed one-off) since fans of the acidic detective have been able to get their fix of new Sherlock episodes. Given the level of superstardom the show’s leads have achieved since its 2010 premiere, fans should likely consider themselves lucky to even get a fourth series.

In fact, according to co-creator Steven Moffat, the story may be nearing its end. “Sherlock series four — here we go again! Whatever else we do, wherever we all go, all roads lead back to Baker Street, and it always feels like coming home. Ghosts of the past are rising in the lives of Sherlock Holmes and John Watson and terror and tragedy are looming. This is the story we’ve been telling from the beginning and its about to reach its climax.”

It’s unclear whether the climax of that story will mean the end of Sherlock, but it wouldn’t be terribly surprising given the rapidly filling schedules of the show’s stars (Cumberbatch is a superhero now, for Christ’s sake).

For the time being, though, Cumberbatch is openly “thrilled” to be back on the set. As he told the Telegraph, “I can’t wait for everyone to see season four. But you will have to wait… though not for long… And it will be worth it.”

Sherlock series 4 will air in three 90-minute blocks at an undetermined date in the future. The odds are good they won’t make their way to North America until early next year.