Michael has trailed Gretchen/Susan, Whistler and Mahone to L.A. Chaos reigns in SONA while T-Bag, Bellick and Sucre go missing. Lincoln and L.J. continue to stay with Sofia.
Michael, Lincoln and the others get a new team member, Roland, and work to copy the data card. Wyatt continues his quest to find the brothers. T-Bag makes his way north.