Always wanted to ask Sherlock co-creators Steven Moffat and Mark Gatiss a question about Sherlock? Well, now is your chance.
From 10:00pm this Sunday 12 January, after the series three finale on BBC One, the co-creators will take to the floor at bbc.co.uk/sherlock.
So what do you want to know? How does Sherlock get his hair so shiny, where did Mrs Hudson get her teapot from… OK, OK. You probably have bigger questions. And now’s the time to get them in.
You can also tweet your questions to @BBCOne using the hashtag #sherlockqa