The fourth season of Prison Break, an American serial drama television series commenced airing in the United States on September 1, 2008, on Fox. It consists of 24 episodes, 16 of which aired from September to December 2008. After a hiatus, it resumed on April 17, 2009 and concluded on May 15, 2009 with a two episode finale. The fourth season was announced as the final season of Prison Break, however the series returned in a limited series format as Prison Break: Resurrection, which premiered on April 4, 2017.