The first season is terrific I would rate it like a 9.5 out of 10. Some people dislike the ending of season one but I thought it made complete sense and kind of loved it. Originally they planned to have a new group of people each season and tell a new story; however, the first season was such a hit the network wanted the fan favorites back again. Huge mistake. The story didn't have anywhere natural to continue to and you feel it being stretched. Finding ways to keep the characters from over coming things with powers they now know how to use. The second season is bad (maybe a 5 out of 10) and each season gets worse than the one for it. Watch season one and stop there.