“But here's the thing. Never mind us blundering fools, check out the fans. Two hundred and ten of them, with the top-secret episode within their grasp – and because we asked nicely, they didn't breathe a word. Not one. Even Doctor Who websites have been closing their comments sections, just in case anyone blurts. I'm gobsmacked. I'm impressed. Actually, I'm humbled. And we are all very grateful.”