Supernatural 10×23 Promo “Brother’s Keeper” Season Finale

Supernatural 10×23 “Brother’s Keeper” (Season Finale) – Dean (Jensen Ackles) makes a shocking decision regarding the Mark of Cain that would change not only his life, but Sam’s (Jared Padaleck) too. Meanwhile, Crowley (Mark Sheppard) and Rowena (guest star Ruth Connell) face off and Castiel (Misha Collins) gets caught in the middle. Phil Sgriccia directed this episode written by Jeremy Carver (#1022). Original airdate 5/20/2015.