Season 4 of TWD brought more changes behind the scenes, changes that would have serious repercussions for the future of the franchise. Scott Gimple replaced Glen Mazzara as show runner, and at the time many fans applauded the decision: The episodes Gimple had written were well received, and Mazzara had deviated greatly from the comic, and killed off Andrea. Gimple himself deviated from the comic: introducing a flu strain that infects humans, animals, and walkers. Gimple's flu storyline, however, worked. Season 4 starts weeks after the Governor's defeat. Rick has accepted more survivors into the prison, creating a community. But the weight of leadership has taken its toll on Rick; he's stepped down and has become a farmer, while the group is led by a council. Carl struggles with trying to follow his father's example, and wanting to help protect the group. Carol's newfound strength was put to the test, resulting in questionable decisions. Daryl was at the height of his popularity; teasing fans with Caryl began in earnest. Hershel's Faith in God and humanity was put to the test, and he did not falter. The Governor's story finally reaches its conclusion, but not before proving just "too far gone" he'd become. Rick and Michonne were teased as a couple, especially after the fall of the prison. Season 4 ended with the realization that fellow survivors are the main threat from now on.