The CW has released an official description for the April 29 episode of Supernatural.
It’s called “Angel Heart” and here is how they describe it:
CLAIRE NOVAK RETURNS — When Claire Novak (guest star Kathryn Love Newton) gets a lead on her mother, Amelia (guest star Leisha Hailey), who has been missing for years, Castiel (Misha Collins) asks Sam (Jared Padalecki) and Dean (Jensen Ackles) to help her. Castiel feels guilty for what he did to the Novak family and wants to make amends by reuniting Claire with her mom. However, when they find out what took Amelia, they realize there is a chance Claire may not get her happy ending. Steve Boyum directed this episode written by Robbie Thompson (#1020). Original airdate 4/29/2015.