This time, Sherlock himself is a bit more pulled together - he's got some snazzy new duds, for instance - and the crew are determined not to rest on their laurels (or sacks of cash) from last time. Says Downey, "Last time we were, I think, treated very kindly, considering that the movie had enough really good, bright, sweet parts and it kinda held up. However, it wasn't exactly the most innovative or clever act three of any movie. But we're all confident that, this time, for the bones of the story, we couldn't work it out any better than we have."
We also chatted to Jared Harris about playing arch villain Professor Moriarty. "He's the ringmaster. He casts his shadow over the whole film, he's the motivator of the plot.
"I'm sure you've noticed that people who don't really give a **** what anybody else thinks, and don't care what the consequences of their actions are are long as they're okay, and don't believe in any kind of divine retribution, they have a licence to do absolutely anything they want. And people who operate within a moral compass, like Sherlock Holmes, their hands are tied. So I'd say Moriarty is very dangerous."