Everything we know about Supernatural season 14 episode 14.
The official Press Release
“Ouroboros”— (8:00-9:00 p.m. ET) (Content Rating TBD) (HDTV)

THE CHICKEN OR THE EGG? – Sam (Jared Padalecki) and Dean (Jensen Ackles) enlist the help of Rowena (guest star Ruth Connell) to track down a demi god who feasts on human flesh. The challenge of keeping Michael at bay is proving to be more difficult than originally anticipated. The episode was directed by Amyn Kaderali and written by Steve Yockey. (#1414). Original airdate 3/7/2019.
The original trailer
The sneak peek
The promotional pictures
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From TV Guide Ruth Connell Teases a Complicated Standoff Between Rowena and Jack on Supernatural
The Mary Sue posted Interview: Supernatural’s Ruth Connell Teases What to Expect With Rowena’s Return
 Who is this new demi-god and why would Rowena help with him? Jack's been burning off more of his soul and may be going off the reservation. Rowena wants to know how Jack survived. She thinks she should have killed him when she had the chance. Maybe Billie was wrong and Sam doesn't kill Rowena in EVERY universe? Dean confides in Cas that he is having trouble containing Michael. From the pictures it looks like Dean is ill. Rowena and Cas bond? What do you think? Let us know in the comments or in the discussion thread for episode 14.