Why is Claire blabbing to Elle about what she plans to do? Why doesn't Hiro tell Peter about Adam and the virus, before apparently attacking Peter? Yet again, the stupid 'misunderstanding' plot device is used again, especially bad since it's used right at the end of the episode. That ending partially ruined the episode for me.
What's lacking this season are some really dangerous villians. Sylar is powerless, and while Elle is really psycho, she's not the main focus. Adam just isn't that frightening. Bob just looks silly with his tilted glasses.
