7x15 - Dark Shadows

Rachel is unable to get into the tower room, she visits Magda who tells her about a key that can open the door. Someone escapes from the tower room and sets Edward’s room on !re. Edward and Beth take the person back to the tower. Rachel confronts Beth about the person in the tower room, she denies that anyone is there. After encouragement from Magda and with key in hand, Rachel unlocks the door to the tower room.