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From Superwiki, the titles, writers and directors for Supernatural season 15 episodes 1 and 2.
15.01 Back To the Future written by Andrew Dabb, directed by John F. Showalter
 
15.02 Raising Hell written by Eugenie Ross-Lemming and Brad Buckner, directed by Robert Singer.
 
15.03 The Rupture via Spoiler TV.

And so it begins!