This order repositions 14 episodes within the show's five seasons, based on evidence from the episodes and other media. Most significantly it moves the Season Four & Five finales outside their respective seasons, based on the chronological setting of their framing stories. The TV movies & spin-offs are inserted within the run of the show, again based on the time frame of their setting.
From https://babylon5.fandom.com/wiki/Viewing_Order#chrono
