User blog comment:A.J AL/Season six plot hole./@comment-5619706-20121215033415/@comment-166.137.156.173-20121215052946

Well, Castiel was able to retrieve at least part of Sam from hell without Crowleys permission, so I maintain that this was a possible option for Cas. But I see that heaven would have been an even richer and more accesible option for Cas. Really anything to avoid that whole leviathan fiasco.