Dean is now a demon and is killing for Crowley. It's Dean just with black eyes, and this time he's working for the King of Hell. Although Crowley says to Sam that it's a relationship between the two of them Crowley wants Dean on his side as Dean is the last Knight of Hell thanks to the Mark of Cain and the First Blade. 第十季分集剧情+主线梳理（全季完结。没有 U R my brother 这句话的话。心疼迪恩。粗嫩爹。我依然期待邪恶力量。二刷流水账。最后的最后，应该会哭的吧。。20150521, s10e23, mark but no comment..............。20150430, s10e20, mark but no comment...................。20150417, s10e18, do business with devil................。 Dean被该隐之印所控变为恶魔，Sam和Cas试图将他带回来，Crowley却试图拉拢他…… 本季故事由此展开
