SPOILER WARNING for all of Sherlock so far.
Well, that was quite the ending, wasn’t it? Just when you thought John and Sherlock had parted, when all was seemingly lost…Moriarty turns up to reunite everyone. It was an ending that no one saw coming, and one that’s going to take a lot of explaining. Fortunately, we have at least a year before the next series starts, so we’ve got plenty of time to hypothesise. Here are three theories for how Moriarty survived his suicide at the end of Series 2.