Above Average...just shy of excellent.
Charlotte dying just when she was getting interesting was a bit of a let down...her story must not be over.
I have a theory that Jacob is a non-corpereal being and re-animates the dead (Christian) as a spokesperson per se. The same thing will happen when the dead Locke comes back.
"Say hi to my son"
That's what I think as well, he can appear as the dead, but is in nature non-corporeal.