Actor Mark Sheppard debuted on Supernatural in Episode 10 of Season 5 and made a mark strong enough to keep him coming back both as a guest star and a series regular for the next seven years. Throughout that time, he's been a crossroads demon, the king of Hell, Demon Dean's best buddy, Lucifer's "bitch," a long-suffering son, a thorn in the Winchesters' side, a helper when it suited his purposes, and trouble in many forms.
All of that changed in the Season 12 finale, where Crowley confronted Lucifer and sacrificed himself for the greater good. The finale also saw Castiel take an angel blade through the heart. It was a moment unlike any other for Crowley and left many a fan wondering if this was the last we'd see of both Crowley and the actor who made him so interesting and, dare I say, lovable over the years.
While we may still be up in the air as to the final fate of Misha Collins' Castiel, we have learned that this is the end for Crowley, thanks to this Instagram post from Mark Sheppard.
If there's anything I've learned about Mark Sheppard, he'll show up where you least expect him and, if past is prologue, we'll fall in love with him all over again.
Rest in peace, Crowley. You'll be missed.