The first three seasons of AMC's hit series The Walking Dead follows Sheriff Rick Grimes (Andrew Lincoln) and his family as they as they struggle to make the harsh adjustments needed to live in a post-apocalyptic society populated by mindless, flesh-eating "walkers" and the oftentimes equally dangerous fellow survivors. The second season introduces a farming family that will become integral to the group's survival, while the third season leads to a prison that the unlikely friends hope will bring them enough security to rediscover their humanity and a semblance of normal life. Unfortunately, a mysterious man who refers to himself as the Governor (David Morrissey) threatens to destroy their new home and the already precarious relationships budding within.