I know that I watched Season 3, but I honestly couldn't tell you what it was about. I watched the Season 4 Carnival of Evil. I have to agree with previous posters, Sylar was awesome, but around way too much. They constantly introduced characters who did nothing then died. GPS girl that Matt fought to save and rescue? I guess she turned to hooking, because she wasn't in Season 2. Irish Girlfriend? For some reason, I thought that Kristen Bell killed her. Badass villain in Season 3 is a man on life support.
To further reflect on how such good will goes terrible so quickly, I quote the Wikipedia synopsis of the Season 2 premiere.
|In March 2007, Suresh and Bennet are conspiring to bring the Company down. Mohinder is hired by Bob Bishop of the Company. The Bennets have moved from Texas to California. Matt has divorced his wife, because she was pregnant from her affair, and is raising Molly with Mohinder. Molly has been having nightmares about a man who can see her. Hiro meets his hero Kensei in 1671 Japan, who is actually an Englishman. Twins Maya and Alejandro Herrera flee a murder charge and try to get to the United States to see Suresh's father, whom they do not know to be dead. Kaito is murdered. Peter is in Ireland and has amnesia. Nathan has become an alcoholic.
I don't know that this much happens in 3 weeks on Days of Our Lives.
Now, all that being said, some wonderful character actors on here. Even Jessalyn Gilsig, who has ruined two TV shows for me (Glee and Nip/Tuck) is decent here. All in service to an unwieldy plot and too many characters.