The story involves Dean being thrown back in time where he meets Cas who is on a mission to stop the prophesied birth of a nephilim. (Can we guess where this is going?)
This is what I meant with the "ran out of printer ink" comment. His dad is a blue haired, pointy eared alien and 99%-sure-his-name-is-Steve's brother has blue hair and pointy ears too. But Steve's a genetic hiccup.