Watch Supernatural Season 10 Episode 23 Online to see Sam fight for Dean and Dean to summon Death. But it's the true secret behind the Mark of Cain that changes everything for the brothers.

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Watch Supernatural Season 10 Episode 23 Online right here on TV Fanatic. Sam continues to try and do everything to save his brother. Dean summons Death, hoping he can help kill him or remove him from hurting other people. Death reveals that the Darkness is being kept at bay because of the Mark. Can Rowena complete the spell? Will Death take Dean? Can the brothers survive? The season finale is a shocking one.

Episode Details

Dean makes a shocking decision regarding the Mark of Cain that would change not only his life, but Sam’s too.

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