Castiel brings Claire back into the fold on Supernatural Season 10 Episode 20 and she even got some hunting tips from Sam and Dean in case she wants to get in on the life again.

Claire finally finds her mom and although there is a tragic ending, it's actually incredibly satisfying and sweet, as well.

Watch Supernatural Season 10 Episode 20 Online

There was nothing on the Mark of Cain, but we were introduced to the Grigori angel and it will be really fun to see if it eventually ties back into the main story somewhere in the future.

Find out what else went on with your favorite brothers and their pal the angel when you watch Supernatural online via TV Fanatic.

Carissa Pavlica is the managing editor and a staff writer and critic for TV Fanatic. She's a member of the Critic's Choice Association, enjoys mentoring writers, conversing with cats, and passionately discussing the nuances of television and film with anyone who will listen. Follow her on X and email her here at TV Fanatic.