What started to turn me off was the death of the Professor and bringing in Maggie (Yuck, the actress who played her could not act). I tolerated the episodes because of the remaining cast. It really killed it for me when Wade was taken off the show. After that I lost interest and really didnt watch it anymore. Once in a while I would catch it but it was not the same. The introduction of Maggie and the constant Kromagg theme made it go downhill really fast. The final nail in that coffin was bringing in the new Mallory and that girl Diana (was that her name???). I could tolerate Collin and the whole brother thing, I just didn't like the way they did it. If they had said Collin was a brother from an alternate timeline and they just took him because he wanted to go, then I think it would have been ok, but the whole long last brother thing, just cheesy.