The fourth and final season, which premiered on March 30, 2010, consists of 10 episodes. Henry VIII's health is in decline, and he is struggling to maintain his grip on power. The season focuses on Henry's marriage to Catherine Parr (played by Tamara Lawford), a mature and kind-hearted woman who brings stability to the royal household. Meanwhile, Edward VI grows up, and Mary I becomes increasingly determined to restore Catholicism in England. The season concludes with Henry's death and the ascension of Edward VI to the throne.