“The Walking Dead” as admittedly one of AMC’s biggest sleeper hits. It seems unlikely at best: a drama about the survivors of a zombie apocalypse, mixed with government turmoil and love triangles. That's realistic, right? But believability aside, it’s one of the best shows to come out of cable in the last decade. It’s no wonder that fans are frothing at the mouth like zombies to see what happens after the bombshells dropped in the last few episodes of season two (Rick vs. Shane). Before you tune in to the premiere in October, make sure you prime yourself on some of the things that’ll go down when you start watching.