S5E7 · At the Codfish Ball

Complete story — includes the ending

When Henry's mother breaks her ankle at the Francis house, Sally and Bobby stay in Manhattan with Don, who is being honored at a banquet for the American Cancer Society. Megan's parents, Émile and Marie, visit from Montreal to attend the banquet, and Megan reveals her parents' divorce intentions to Don. Abe and Peggy decide to move in together; Peggy reveals the news to her mother, who disapproves and states that Abe is "using" Peggy as practice. Megan approaches Don with an idea for the Heinz campaign. During a dinner with Heinz executive Raymond, Megan learns that Heinz is planning on firing the agency and secretly tells Don, prompting him to pitch Megan's concept to the table. Raymond is impressed and approves the pitch. At the banquet, Don discovers that his professional reputation has been damaged because of the letter he wrote against Lucky Strike, while Sally inadvertently walks in on Marie giving Roger fellatio. Émile tells Megan that she has changed, reminding her of her acting dreams and insinuating that her marriage to Don has allowed her to take a shortcut in her life instead of working for it. Megan rebuffs him, but is visibly bothered by this truth.