Season 1, easily a 9.5/10, season 2 still good, probably a 9.1/10. But season 3 makes the show go SO downhill... I would personally rate season 3 a 6.7/10, it sparked awful teenage fan bases, and what the hell is "Mileven?" The season did have a couple good traits, but it was mostly crap. I really didn't enjoy that it showed the child character's personal lives when they are not immersed in unusual activity, the final episode was the only good one of season 3, and even that was pretty weak compared to the other seasons. I have quite low expectations for season 4, due to the sheer awfulness of the previous season.