Naw, I don't think Hiro or Claire will die, they're too critical to the cast and now are superstar celebrities. The next episode looks like Peter takes on the power of the Radioactive Man and blows up New York like a human nuclear bomb. But I doubt they'd kill of his character either. Milo can't leave the show!!!

I think we'll learn more about how HRG will handle Sylar. and also about Mohinder's list as the previews foreshadow. I hear there will be new characters introduced during the second half of the season, so I'm interested in who these characters will be. Maybe Claire will try to find her real parents...