Once more into the grim unknown, friends. The Walking Dead is over for a another season, and while the prequel show will ease the pain of leaving Rick and the survivors for an extended period, it's a placebo medicine at the very most. There's no substitute for the real thing. After an explosive finale, there are inevitably a raft of questions left over ahead of the sixth season, and luckily there's a long time to pour over them and come up with your own theories, as the fanbase inevitably will. As usual, the fifth season brought death, new enemies and a new power dynamic, and while most fans will have been suitably distracted enough by the narrative, AMC did their usual trick of stuffing the background with references and in-jokes to reward those fans who watch again and again. But which were the best and the most notable of the season gone?