S4E8 · The Summer Man

Complete story — includes the ending

Following Anna's death, Don attempts to regain control over his life through physical changes and journal writing, while Betty forbids him from attending Eugene's birthday party. After clashing with Joan in the office, freelance artist Joey Baird draws an obscene cartoon of Joan giving Lane fellatio and tapes it to her office window. Peggy is personally offended and informs Don, who tells her to fire Joey herself. When Joey refuses to apologize, Peggy fires him; Joan is upset with Peggy for firing Joey on her behalf, as it reinforces the stereotype that working women are frivolous and vindictive. Betty is flustered when she and Henry run into Don and Bethany on a date, infuriating Henry, who questions whether Betty is still in love with Don. The next morning, Betty apologizes, explaining that Don was the only other man she had ever been with. Despite Bethany's insistence on moving their relationship forward, Don ends up pursuing Faye, resulting in an impromptu dinner date during which the two bond. Don arrives at the Francis household to attend Eugene's birthday party, despite not being invited; Betty stops Henry from confronting Don, reasoning "we have everything".