Brother's Keeper

My Brother's Keeper is the season finale of Season 10. It will air on May 20th, 2015.

Characters

 * Dean Winchester
 * Sam Winchester
 * Castiel
 * Crowley
 * Rowena
 * Death

Featured Supernatural Beings

 * Horsemen
 * Angels
 * Demons
 * Witches

Trivia

 * In the Bible (Genesis 4:9), when asked where Abel was by God, Cain answered "Am I my brother's keeper?". Could be foreshadowing events.