Everything and everyone involved does incredible stuff, IMO.
As far as I can recall it was a very convoluted prison-break for someone thought to be dead that included an attempted revenge assasination, distraction bombing of a federal agency, kidnappings and multiple double agents.
Wikipedia says the pilot was filmed in March 2001, and production began in July 2001, so the broad strokes of the show were maybe mostly written prior to 9/11, but most of the actual filming likely happened after (which means writers also had time to rewrite at least some things).