Here's a brief overview of the show's seasons:
May 15, 2009 (Episode 22, "Killing Your Number"). when did season 4 of prison break come out
September 1, 2008 , on Fox in the USA.
: After a mid-season hiatus, the remaining episodes resumed on April 17, 2009 , and the television broadcast concluded on May 15, 2009 . Here's a brief overview of the show's seasons: