Where the Mad Men Characters Began and Where They End Up

After Betty has another child with Don, she divorces him and then quickly marries politician Henry Francis. Betty's weight notably has its ups and downs, as does her marriage to Henry. She even cheats on him with Don once, but she and Henry remain married. Ultimately, Betty is the big death of the season finale, even though the last time we see her, she's alive. She learns she has lung cancer in one of the final episodes and mere months to live.