Ep 16. Roadkill

After a fight with a set of demons, Sam and Dean are summoned to a stretch of highway where the same ghostly woman repeatedly appears and disappears in front of drivers, causing fatal accidents. The Winchester brothers try to help the ghost and find her murderer. But things get complicated when the ghost's husband — and killer — turns up alive and well. As they help the ghost find peace, Sam notices a strange mark on Dean's arm and starts to worry about his brother's well-being. Along the way, the brothers also confront their own fears and emotional traumas as they deal with the consequences of their dangerous lives. Will they be able to help the ghost and find a solution to their own problems, or will they fall victim to the same fate as the drivers on the haunted highway? Find out in this emotional and action-packed episode of Supernatural.