Supernatural
S01E06 Skin
Sam and Dean are called upon to help Sam's former college friend, who finds himself wrongfully accused of murder. Determined to prove his innocence, the brothers uncover a shapeshifter that has been mimicking various individuals to carry out its deadly deeds. The situation escalates dramatically when the shapeshifter takes on Dean's appearance, forcing the brothers into a tense and dangerous confrontation as they race against time to stop the killer before it's too late.