S4, E9: A group of Civil War reenactors is in the midst of a mock battle when they find an actual civil war ghost in their midst! The Librarians are called onto the case and head to a town called Feud, right on the Mason-Dixon line. It was recently renamed after evidence was found by the local historian, Janet Hedge, that two brothers, on opposite sides of the war, killed each other in a civil war battle in that town. Since the discovery, the town has become a tourist destination, with Hedge running the local museum. For many years, only one brother's half of the locket, separated and given to them each by their mother, has been displayed, but Hedge has just announced the other half has been found, so she's holding a celebration ceremony.