When is Going On on Heroes?!?

Can anyone explain to me all this four years in the future crap? I mean didn't they just change the future from the desolate wasteland quarantine thing so wouldn't the gee some people know how to fly thing be a much better outcome? As they said last night, the world is always going to need saving so how about chilling in your own time instead? I mean Peter was remarkably calm about the fact that his future self got shot by his niece before his very eyes, no? I can't believe I'm still watching this garbage. Someone please help me stop.