Mr. Scheuring, the producer of PB, said in an interview at one of the shows in the US that he plans to make this a "trilogy". He said season 1 & 2 would be the 1st chapter, season 3 & 4 will be 2nd chapter, and season 5 & 6 the 3rd chapter. I hope his plans will push thru and that means there will be more Prison Break seasons to watch out.