how many season are there of prison break
The fourth and final season of Prison Break, an American serial drama television series commenced airing in the United States on September 1, 2008. It consists of 24 episodes (22 television episodes and 2 straight to DVD 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.