Don and Peggy work overnight on Samsonite, Duck Phillips makes a drunken visit to the office, and Don finds out Anna has died.
Sally runs away to Don's office, Miss Blankenship dies, and Roger and Joan get mugged.
Betty and Henry move out of the Ossining house, Don proposes to Megan, and Peggy and Ken sign Topaz Panti-Hose.
Don runs into Midge and pens a full-page anti-smoking letter to the New York Times, and Bert Cooper quits.
Peggy fires Joey over an obscene cartoon of Joan, Don tries to clear his mind, and Betty runs into Don and Bethany at a restaurant.
Don visits Anna in California and finds out she has cancer; Don and Lane bond during a night on the town.
Sterling Cooper Draper Pryce battles for the Honda account, and Sally ends up in psychotherapy after acting out.
Lucky Strike leaves Sterling Cooper Draper Pryce, Lane's father visits, and Don's identity is threatened by an account.
Sterling Cooper Draper Pryce wins a Clio award, Don has an alcoholic blackout that affects a client, and Peggy and Stan face off.
Pete and Peggy pull a PR stunt for Sugarberry Ham; Don's failed interview with Ad Age looks bad for the company.
Freddy Rumsen returns with Pond's Cold Cream, Lee Garner Jr. attends the company's impromptu Christmas party, and Don sleeps with Allison.
Pete finds out Trudy is pregnant; Allison has a meltdown and quits; Peggy and Joyce attend a party downtown.
News of Lucky Strike's departure spreads, Stan gets revenge on Peggy, and Trudy has a baby girl.