Board Thread:Spoilers!/@comment-4877635-20150304180627/@comment-25733960-20150306233025

Hmcooper4 wrote: Before we go too far down the "Cora is Dead" route. a couple of things. While I agree that Cora 'died' when Mary Margaret cast the spell and Regina shoved her heart back in, that was a magical death. And as we all know, magical deaths can be undone. Rumple Died, but is back. Apparently Zelena "died" (Ok, this one may be fake), and is back. Mother Superior died, and is back.

Mother Superior wasn't dead... she was just shadow-less, just like Phillip and his soul

And I don't know if Rumple actually died. I think they said in season 1 that The Dark One can't kill himself with the dagger.