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).
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).