People really seem to hate the concept of not watching every single millisecond of an episode. Why do I get the feeling that if I was watching Voyager I'd have everyone telling me that I need to watch Thershold, or if I was watching TNG that I could not afford to skip Sub Rosa?
They wouldn't say it for those shows, because the thing is, Babylon 5 is an *arc*; it's all tied together. The campaign in Illusion of Truth leads to some motivations for characters down the road, and ties into where the main characters are going. Voyager and TNG weren't tied together episode-to-episode in that way.