Sam was in the living room, telling Dean and Gabe about what happened, when he heard a scream.

Cas' scream specifically.

The three jumped up and ran to the room. They barged in and ran to Cas' side, who was shaking and crying on his side.

"Cas, hey. Hey. It's okay. Come on buddy." Dean helped Cas sit up.

Gabe gently kissed his brother's head and held his hand. "You had a nightmare, Cas. That's all."

Sam put his arms around Cas. "It's okay. I promise, it's okay."

The three stayed there, comforting the youngest of him all until he fell asleep. They all decided to sleep in the same bed with him, hoping their presence would help Cas sleep.

Cas didn't have anymore nightmares that night.