The merged companies start to sort things out such as new offices but also deciding who to let go. Ted Cheough makes an immediate impression with the staff. He's not too keen when he finds Don is late for a ...
Don and Megan take a trip to Hawaii for the holidays, Sally's friend visits the Francis family, a comedian torpedoes Peggy's Super Bowl ad campaign, and Roger gets some bad news about his mother.
Don strikes up a friendship with the surgeon in his building, Peggy tries to save her campaign, Roger makes a scene at his mother's funeral, and Betty goes to Manhattan to find Sally's friend.
While Don continues his affair with Sylvia, Pete's latest infidelity threatens his marriage. Meanwhile, Peggy's icy relationship with her new staff continues, but she also gets an unlikely tip on a potential new client.
Don works in secret on a Heinz ketchup campaign while Megan gets a love scene on the set of her soap opera. Meanwhile, Harry makes his power play while Joan has more trouble with the secretaries.
Set among the events surrounding Martin Luther King's assassination, Peggy tries to get a new apartment, Ginsberg is set up on a date, and Don has a revelation during his weekend with the kids.
As the firm prepares to go public, Don and Pete's actions cause them to lose two huge clients. However, Roger uses a new connection to put them in position to gain their biggest client ever.
Things quickly become awkward after the two firms merge, Don asserts his dominance over Sylvia, Pete has to deal with his ailing mother, and Bob Benson helps out a sick Joan.
The merged companies start to sort things out such as new offices but also deciding who to let go. Ted Cheough makes an immediate impression with the staff. He's not too keen when he finds Don is late for a brainstorming session with the creative team for a potential new client, Fleischmann's margarine. Don is unapologetic about missing the meeting and goads Ted into drinking match that he easily wins. Ted gets payback when he and Don fly to a meeting in Ted's airplane. Bert Peterson is no sooner in the office than Roger fires him.....again. Joan finds herself in ...