Heroes represents a show that is losing interest with every season and every episode. I remember getting insanely bored with storylines we were seeing in season 3. Season 4 opener was a decent start. We have a new villain this time. So we can probably give Sylar a break. Oh wait!no!. He's still there, isn't he? living inside Matt Parkman's brain and driving him crazy. Claire deals with a mystery of her own, trying to solve the murder/suicide of her roommate, and in the process inadvertently revealing her powers to a new friend. The new friend also seems creepy; she might have some powers too. We've seen a similar situation before in the West kid in California.
Otherwise, it is the same old heroes. Noah is still obsessed with the company. Peter and Matt want to live a normal life. Hiro travels through time, this time playing cupid for Ando and Kimiko. I don't know why we didn't see Mohinder this time. Is he axed by any chance?
Overall, there is sufficient mystery built to carry this forward. Lets see.