[[12.3 The Foundry]] begins with [[Mary]] finding a case in Minnesota where people are found dead after reporting hearing a baby crying. [[Sam]] expresses concern over Mary's desire to get back into hunting but [[Dean]] is all for a "family hunting trip". Mary struggles with her lack of knowledge about the technological methods the boys use, and the aftereffects of the attack. While salting and burning what they think is the ghost's bones, Sam remains concerned about Mary but Dean still believes she's just "adjusting". They return to the room to find Mary gone and upon discovering she's returned to the house, they return to rescue her but she's been possessed by the actual ghost. The ghost tries to make her kill Dean but she resists it and releases him. Dean keeps the ghost occupied while Sam finds the bones and burns them, which releases Mary and the ghosts of all the children in the house. Back in the Bunker, Dean apologies for taking over her case, but becomes hurt and angry when Mary says she has to leave to have some time by herself.
===[[:Category:Season 13|Season 13]]===