In season four, Harold Perrineau rejoined the main cast to reprise the role of Michael, now suicidal and on a desperate redemptive journey to atone for his previous crimes.
Na cuarta tempada, Harold Perrineau volve ó elenco principal ó retomar o papel de Michael, agora con tendencias suicidas e nunha desesperada viaxe de redención para expiar os seus crimes anteriores.