For example, we heard Adam tell Peter that losing your head is the one thing you can not come back from. I'm going to take that to mean decapitation because we clearly saw Claire's blood bring Noah back from the dead after getting shot in the head. No to mention Adam's death back in Feudal Japan when the gun powder tent exploded.
Oh wait; did I also forget how Peter came back from his fatal "glass in the head" wound brought on by Sylar? What about Claire waking up in the morgue after having a wooden spike removed from her brain? I think it may be that the blood is the secret sauce that keeps those Heroes regenerating and that if one of them were to lose their head they would regenerate as soon as the head was stuck back on their neck. Unless their body was allowed to decompose to the point where there was no more blood that is.
Speaking of Sylar, I'm taking the "tick-tock" noise we hear to be an indicator that he has his powers back. He was likely being fed the same pills Peter was on and the drugs have now worn off.
Why has he not killed Maya yet? Well, he does not need to. I think Sylar may have learned that he can gain more by having other Heroes on his side rather than by just stealing their powers.
What about Micah's cousin? Didn't she watch that wrestling show (among other combat arts)? Why didn't she go all "superfly girl" on those guys when they caught her in the house? Not only that but why did she not leave the house the same way she got in, out the WINDOW!!!
All I can say is "meh, why did I stay up to watch this?"
