Castiel's grace is slowly fading away on Supernatural, and when it's gone it will be game over for the rebellious angel.

Sam & Cas Prepared To Kill Demon Dean On 'Supernatural', Jared Padalecki Talks Containment Options

Unlike when Metatron sniped Cas' (Misha Collins) original grace (see video below), Collins' character will not revert to a human form when his essence dies out. Instead, the angel will find himself six feet under. Unless Team Free Will can find a way to restore Castiel's original grace, that is.

While the Supernatural writers find away to (hopefully) save the heavenly solider, Collins recently contemplated what Cas would do if he only had one day left to live.

Felicia Day To Return As Charlie During 'Supernatural' Season 10? Writer Dishes On Possibilities

"He would probably get a cat and cuddle up with it," Collins said at Rome's fifth annual Jus In Bello Con. "I think, knowing Cas, he would probably try to fix as many things as he can with his diminishing power before he dies because he is always trying to do the right thing, you know. And he is willing to sacrifice himself if it comes to that.

In the midst of trying to save or improve as many lives as possible, Castiel would also want to make a stop at the Men of Letters bunker before his light fades out completely.

"He would probably want to say goodbye to Dean and Sam," Collins continued. "Probably not Crowley."

Find out if Cas and his grace can be salvaged when Supernatural returns to The CW this fall.

Tags: supernatural television the cw