Hm. By the way I was just reading that Russell T Davies wanted a Harry Potter meets Doctor Who crossover for Children In Need and even wrote the script for it and it didn't happen cos the Harry Potter cast were busy. This be another in the loooong list of reasons why I'm so glad he's not in charge now. I love that Moffat pretty much confirmed Sherlock Holmes is a fictional character in the Snowmen. No chance of a tacky crossover even with his own shows then. They're great seperately but wouldn't work if in same universe.