The inmates run the interior; guards only stop escapes from the outside.

Kim corners the brothers on a boat, but Sarah shoots him to save them.

Michael discovers that Mahone, Bellick, and T-Bag have also been incarcerated there. Key Character Fates

Michael is sent to Sona , a federal prison where guards only patrol the perimeter.

His drug withdrawal and legal failures land him right next to the man he hunted.

Michael takes the fall for Sarah's crime to protect her.