Some information if you’re confused:
Episode 22 was indeed the series finale of this show. However, two bonus episodes were produced, and FOX decided not to air them.
These episodes take place after most of the events in E22, but before the ’4 years later’ time jump.
The episodes were ‘converted’ to a standalone ‘prequel movie’, titled “Prison Break: The Final Break”.

Watch Prison Break The Final Break Season finale Special

A woman, framed by a secretive government agency known as the Company, is sent to a Panamanian prison to serve a life sentence…