S7E8 · Severance

Complete story — includes the ending

In April 1970, Don, restored as creative director and back in his old office, resumes bachelor life and womanizing. After a cryptic dream about Rachel Menken, he seeks her out but learns she has died of leukemia. He becomes fixated on a diner waitress named Diana, believing they have met before; though she denies it, they begin an affair. At McCann Erickson, Peggy and Joan attend a meeting where Joan is sexually harassed, leading to a heated argument between the two afterward. Roger and Ferg Donnelly of McCann fire Ken due to McCann's lingering resentment over his role in losing Birds Eye and disparaging the agency. Though Cynthia urges Ken to leave advertising to write full-time, he instead accepts a position at Dow Chemical through his father-in-law and warns Roger and Pete he will make Dow a difficult client out of spite. Peggy dates Johnny Mathis's brother-in-law; after a drunkenly planned trip to Paris stalls when she cannot find her passport, she dismisses it as folly. Don and Diana tentatively pursue a relationship.