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  ====Sixth season====
  Despite their victory over Stannis, Roose warns Ramsay that the North will someday have to face the Lannisters, and chastises him for allowing Sansa and Theon to escape, as Sansa was crucial to unifying the North. He implies that if Sansa is not recovered, Ramsay's position as heir may be usurped by Walda's baby. Soon afterwards, it is announced that Walda has given birth to a boy; Ramsay immediately kills Roose by stabbing him in the stomach, before setting his dogs upon Walda and the baby, severely jeopardizing House Bolton and leaving Ramsay as the last remaining Bolton. Ramsay is ultimately killed when Jon Snow retakes Winterfell in the Battle of the Bastards, leaving House Bolton extinct.