Do you understand who I am now? I couldn't have possibly done it without you. You were too naive for your own good, too trusting, but I had to get out no matter what. You can fight me all you want, it doesn't make a difference to me. In the end you'll be mine either way, and I'll make sure you never disobey me again. Tom Riddle -x- Reader. OC.

Oneshot where Cas, Dean and Sam meet the Doctor and his companion and travel to a different planet for the day. Castiel develops feelings for the companion quickly but has to leave her at the end.