Changes

Dean rubs his arm once early in the episode, as though the mark is sore or bothering him. Towards the end of the episode, Castiel asks if Dean is okay, sensing something; then asks him, "Deandemurs, what did you do?" Dean demurs but Castiel grabs Dean's arm and pulls up Dean's sleeve to reveal the markthen asks him "What have you done?" and Dean justifies it as the means to an end. "Damn it, Dean!" Castiel says, but without further explanationleaves telling him that while Castiel locates Heaven, he has a Knight to kill. After Dean gets into the Impala, Castiel tells Sam to watch over keep an eye on Dean.