Charles Magnusson was a nasty piece of work: half school bully, half Bond villain. That photographer was evil, but nearly too clever for his own good. That MP who blew up Parliament was never going to trouble Sherlock all that much. But to answer your question, Jim Moriarty, yes. You have been missed. Andrew Scott's take on Holmes's nemesis is one of the most insanely frightening and hilariously charismatic performances that British television has seen for years. He can flick the switch between those two superlatives, and whether 'The Empty Hearse' left you pleasantly satisfied or horribly frustrated, Sherlock has certainly been a twisted show without him; it's no wonder the writers have moved onto more character-based episodes. The question on every Sherlockian's lips though is where the show's heading next. Did we really just theorise over Sherlock's death for two years, only for Moffat to drop the clanger that no one died on the roof? Here are six possible theories for how Jim Moriarty survived. Warning: does not contain the one about Sherlock and Jim getting together.