Top adman Don Draper works at one of New York's most prestigious ad agencies in the 1960s and '70s, but his personal life sometimes gets in the way of his performance at the office.
Don has difficulty adjusting to being the public face of his new company, while Betty and the children endure an uncomfortable dinner with Henry's family.
Don faces spending Christmas alone. Peggy is delighted by Freddy Rumsen's return, and the arrival of a big client forces Roger to change plans for the office party.
Don heads to Los Angeles to visit Anna, but learns a worrying secret about her. Back in New York, Joan finds it difficult to cope with Greg's new career in the Army.
Pete tries to tell his father-in-law that the company will not be handling a certain product any longer, but is stopped in his tracks by surprising news.
Betty is appalled by Sally's increasingly worrying behaviour - and has no qualms about letting her daughter know the extent of her anger.
Don lets an award nomination go to his head, leaving Peggy fuming as she tries to work with the new art director. Meanwhile, a hopeless interviewee proves difficult to get rid of.
Peggy endures a long night in the office as anticipation for Cassius Clay's rematch with Sonny Liston reaches fever pitch.
Don begins to keep a journal as he battles to bring his drinking under control. Joan's frustrations mount after clashing with Joey, while Betty tests Henry's patience.
An unexpected arrival at the office causes trouble for Don. Roger worries about how distant he and Joan have become, and Peggy's reunion with Abe does not go to plan.
A new contract has serious implications for Don, and unexpected guests leave Betty unnerved. Lane's father arrives in New York, intent on taking his son back to London.
Rumours fly around the corridors of Sterling Cooper Draper Pryce, leaving Roger struggling to cover his tracks. Peggy takes a surprisingly enjoyable trip with her new friends.
Don comes up with a risky strategy to change the company's fortunes, but his approach leaves his colleagues outraged. Sally receives good news from her psychiatrist.
A trip to California forces Don to consider his future. Meanwhile, Peggy spots a new business opportunity, and Betty takes drastic action after an unwanted visitor pops by.