Metatron claims that Castiel fell in love with humanity on Supernatural Season 9 Episode 22, "Stairway to Heaven."

Dean has a firm grasp on Tessa as he takes her away in this photo from "Stairway to Heaven."

Dan can only be talking to angels in this photo from "Stairway to Heaven." Who else can they be?

Dean appears to be calm. No Mark of Cain action in his dealings with Tessa in this this photo from "Stairway to Heaven."

It appears as if Tessa will be answering some questions as shown in this photo from "Stairway to Heaven."

Tessa the reaper is back when Lindsay McKeon guest stars as shown in this photo from "Stairway to Heaven."

Driving home the fact that the quest is of importance, here's another photo of Castiel and Dean searching from "Stairway to Heaven."

Cas and Sam really need to find something as shown in this photo from "Stairway to Heaven."

Sam finds a clue in this photo from "Stairway to Heaven."

Sam and Castiel are using flashlights to aid their search in this photo from "Stairway to Heaven."

What's behind the door? It looks a lot like a scene of Aliens landing, but that'd doubtful. Place your bets while your enjoy this photo from "Stairway to Heaven."

Do you think Metatron will actually pick up a ball or only pick on the other players in the alley as shown in this photo from "Stairway to Heaven."