How many episodes of prison break season 4 are available now?

There will be 22 episodes of Prison Break season 4 when its completed. At the hiatus on Dec 22, 2008 only the first 16 episodes had aired. The series returns on Fridays between Apr 17, 2009 thru May 15th (US) to air its final 6 episodes (epi 17-22). Season 4 is the finals season so tune into FOX to see how the story ends. (UK episodes start back up Tue, April 21). Prison Break was not renewed for a 5th season, but its not over until its over, so be sure to tune in to see how the story ends. edited from: they are only 16 episodes of prison break season 4 .