First season was very good. Second season a decent sequel. Third season seems to have been written and directed for kids: Shopping montages. Tween romances. Over-wrought stereotyped characters. Really terrible for anything other than after-school specials.

It's compounded by bizarre kitsch, like a knock-off Schwarzenegger Terminator-like character.

And then there's the plot. I didn't have any trouble buying the first season's psychic kid opening a portal to an evil alternate dimension. But by season three we're given a massive Soviet military facility operating hidden under a middle-America shopping mall. Yes, it's as stupid as it sounds.