Jack: My mother, she said Castiel, he would keep me safe. She said the world was a dangerous place. That’s… that’s why I couldn’t be a baby or a child. I… That’s why I had to grow up fast. That’s why I chose him to be my father. Where is he?
Sam Winchester: He’s dead.
From Supernatural: Season 13 Episode 1: ‘Lost and Found’ (13×01)
