Bellick moves in with Michael, Lincoln, and Nika; a family picks up hitchhiker T-Bag; Kellerman makes his move on Sarah.
Mahone takes a sudden interest in the case of D.B. Cooper and receives a special delivery; Michael and Lincoln search for the Double K Ranch; Sucre races to Las Vegas to stop Maricruz's wedding.
Lincoln determines to reunite with LJ; Michael, C-Note, Sucre and T-Bag's hunt for buried treasure pays off.
Abruzzi, Sucre and C-Note run on their own; Michael and Lincoln plan another breakout; Bellick and Warden Pope have to answer to their peers regarding the prison escape; Tweener hitches a ride with the college crowd.