Fox has announced the cancellation of Prison Break.
Prison Break first went to air in 2005 with strong ratings, but slowly lost viewers as the show progressed. From a peak of 12.1 million viewers the third series averaged only 6.1 million. Fox ordered an additional two episodes for Season 4 in November, sparking rumors that they may be the finale for the show; the rumors turned out right.
The fourth and final series of Prison Break will air on Fox Friday nights from April 17.
