Here's your wrap-up:
Mohinder: Starts it off with some pseudo-intellectual/bull**** quote that has nothing to do with anything.
Peter: "I kinda, sorta, maybe want to help people. Sorta. Maybe I'll do that. Kinda."
Claire: "Dad, I love you. And I like girls now." "Claire, are you really sure that's what you-" "Dad, I hate you!" Two months later. "Dad, I know you really just want what's best for me. I love you." "I love you too, Claire Bear." "Stop calling me that! I hate you!"
Nathan: Gets resurrected. Sylar eats his brain. No one cares.
Niki/Tracy/Whatever: Third triplet shows up and does morally ambiguous stuff. No one cares.
Hiro: Finally starts acting like an adult. Nah, just kidding.
T-Bag: "Even Prison Break had better writing than this ****. Yeesh."
Sylar: Blows up the world. Good riddance.