Prison Break is a popular American television series that aired from 2005 to 2009, with a revival season in 2017. Season 4, also known as Prison Break: Conspiracy, consists of 13 episodes that premiered on April 17, 2009. The season follows Michael Scofield (Wentworth Miller) and his brother Lincoln Burrows (Dominic Purcell) as they navigate a new conspiracy involving a mysterious organization.