The theme of Season 9 of Supernatural seems to be borrowed from its current showrunner’s past – it’s all about ‘being human.’ Castiel struggling to embrace his newfound humanity. Crowley seemingly trying to become more human, for reasons as yet unknown. Zeke, again for reasons unknown, wanting to be human a while longer, by remaining in his human host, Sam Winchester. Kevin proving just how strong and heroic an “ordinary human” can be.
And Sam and Dean, who have always been portrayed as oh-so-very human, with everything that those human flaws entail.