Mark Gatiss has revealed that next year’s Sherlock special will be co-written by Steven Moffat and himself.

Gatiss told EW: “Steven and I are writing the special at the moment, which we’re shooting in January.”

He added: “Then we’re doing three more towards the end of next year. So there will be four in total! Which is a world record. But we don’t know when they’ll be on.”

> Here’s everything we know about the special and Series 4 so far.

Moffat teased earlier this year: “…the very next thing to happen to Sherlock and John, is the very last thing you’d expect…”

What do you want to see in the special? Let us know below…