So we're now nearly halfway through the fourth season of AMC's The Walking Dead, and, as a whole, we've been pleased with the level of quality with the new episodes. The show has seemingly continued in the quest to rid itself of the more filler-based installments - basically a great deal of the second series - and pushed on to show content which is both exciting and can seriously mess us up emotionally. We've had full scale turf wars, tempestuous sibling rivalries and countless deaths of characters once thought untouchable. Furthermore, on the way we've been tossed some real posers to consider about life in a time where society is essentially a giant succulent steak to the shambling undead. Of the ones which have nagged me since the very first episode, only one has really been answered by the current season: can the walkers get sick? The brilliantly disturbing scenes of walkers with blood running from their eyes checked that box, and then made it all the more frightening when their double-whammy of a disease spread amongst our heroes. So there's one down, here are seven more.