In the episode "Sick" from The Walking Dead Season 3 , the group works to save Hershel while navigating a tense alliance with surviving prison inmates who they eventually have to eliminate. Rick makes a definitive turn toward a more ruthless leadership style to protect his group, especially after a confrontation with the inmates leads to a fatal fight. The episode also highlights the growing divide between the survivors and the harsh realities of their new world. For more, you can read recaps on TV Tropes or Fandom . The Walking Dead S03 E02 "Sick" Recap - TV Tropes