The BBC promised us a surprise at the end of tonight's Sherlock re-run, and my what a surprise they gave us: The very first teaser trailer for Sherlock Season 3.

There may not have been any clues as to how Benedict Cumberbatch's slippery sleuth survived that Reichenbach Fall, but there was more than enough mysterious action to leave us in quite the tizzy about what's to come. Check it out below:

We're digging Martin Freeman's moustache by the by.