“We have a plan to top it. And I do think our plan is devastating. We’ve practically reduced our cast to tears telling them the plan… we’re probably more excited that we’ve ever been about Sherlock,” Moffat told reporters asking if he thought the next season could beat season three’s epic run.
Gatiss chimed in later that night: “We’re going to try to take it somewhere we’ve never been before — and I don’t mean outer space. It will be challenging place to go. We always start with a re-introduction that builds toward a darker climax — we might just be going darker [from the outset]. We got a very, very good set of ideas.”
“It’s very meta. The entire cast and crew are trapped inside their own escape room, for three 90-minute episodes …….The public have to help us get out. That’s quite good”