At the Codfish Ball

Sally Draper (Kiernan Shipka) calls Glen Bishop (Marten Weiner) to complain about Pauline Francis (Pamela Dunlap), who is babysitting her and Bobby while the rest of the family is on vacation, calling her step-grandmother "Bluto" and saying she smells like a toilet. Pauline trips on the telephone cord outside the door and falls.

Don (Jon Hamm) hauls Megan's parents' luggage into the apartment. Her father Emile (Ronald Guttman) and mother Marie (Julia Ormond), visiting from Montreal, argue in French. Megan (Jessica Paré) asks them to speak English. Don takes a phone call from Sally about Pauline's accident. Later, during dinner while Don is absent, Emile criticizes Don and Megan takes offense. Don arrives with the kids, saying that Pauline broke her ankle. Sally says that Pauline tripped over a toy, and Don praises his daughter for how she handled the situation. Marie excuses herself from dinner. Megan goes to check on her and, finding her mother asleep with a burning cigarette still in hand, sadly takes the flammable object away and leaves her alone to slumber.

Roger (John Slattery) and his ex-wife Mona (Talia Balsam) meet, and he tells her about how his recent LSD experience has changed his life. He requests her assistance arranging meetings with prospective clients he will be meeting at an upcoming American Cancer Society dinner to honor Don for his published anti-smoking letter. She knows about his forthcoming divorce and is amused by it, but implies she will help him out with business anyway.

The next day, Megan approaches Don with an idea for the Heinz campaign: a mother serving her child beans in various historical contexts, from caveman times through to the future. They discuss different tag lines, and an excited Don tells Stan Rizzo (Jay R. Ferguson) and Michael Ginsberg (Ben Feldman) about the idea. Abe Drexler (Charlie Hofheimer) calls Peggy (Elisabeth Moss) and insists on meeting her for dinner. Stan and Ginsberg complain about the last-minute Heinz change but Stan admits it's better than anything they'd come up with before.

Peggy tells Joan (Christina Hendricks) she thinks Abe is going to break up with her over dinner, but Joan tells her that perhaps he is going to propose to her, telling her that if he breaks up with her she already knows her response, but if he is going to propose, that she needs to have her answer prepared, especially if it is no. Peggy arrives for dinner with Abe in a new dress, who doesn't ask if she will marry him but rather if she would like to move in together. She hesitates but says "I do".

At a dinner with Heinz, Megan learns the Heinz client, Raymond Geiger (John Sloman), is planning to fire the agency. She secretly tells this to Don and prompts him to pitch the new concept at the table. Raymond is impressed and finally gives the plan a thumbs-up. Later in a cab, Don lavishes his wife with praise and kisses. Since their apartment is currently crowded, she suggests they have sex at the office.

The next morning, Peggy tells Joan that she and Abe are moving in together, worried that Joan will be disappointed for her. Joan calls it a romantic notion and suggests marriage may be overrated, noting that Greg had decided his commitment to the U.S. Army is more important than his commitment to her. Ken Cosgrove (Aaron Staton) recounts the Heinz meeting to everyone in the conference room, but Harry Crane takes credit he doesn't deserve, while Pete Campbell notes they still are out of thousands of dollars spent wooing Heinz. Don credits his wife, who calls it beginner's luck. Peggy congratulates Megan, telling her "This is as good as this job gets." Megan looks melancholic, not being enthusiastic about it as she is being told she should be.

The next day, Sally asks her father if she can go to the awards dinner. Emile and Marie quarrel again, and Megan lets Don know that her father is cheating on her mother.

That evening, Roger arrives and Marie helps him with his bow tie. Sally shows off her dress. Don tells his daughter to remove her makeup and go-go boots before they leave, with Emile making a comment about daughters growing up. Later in the award room Don affectionately tells her that she is a beautiful girl who will one day wear makeup but not tonight.

Peggy and Abe prepare dinner at her apartment. Her mother Katherine (Myra Turley) arrives, and Peggy tells her that she and Abe are moving in together. Katherine opposes the idea and says she would rather Peggy just lie about it. She tells Peggy that Abe is just using her as practice before he decides to marry and have a family with another woman in the future, and snidely advises her to just "get a cat" if she's lonely.

At the ACS dinner, Pete Campbell (Vincent Kartheiser) introduces Don and Megan to Ed Baxter (Ray Wise), Ken’s father-in-law. Ed compliments Don's talent and Megan's contribution to the Heinz campaign. Roger shows a genuine side when he spends the night with Sally on his arm, telling her about the event's attendees; Marie watches him from across the room. Later at the bar, Marie approaches Roger. Meanwhile, Emile tells Megan she has changed, that her marriage to Don has ultimately allowed her to take a shortcut in life instead of working for it, reminding her of her acting dreams she was once so driven about. She rebuffs him but is visibly bothered by this truth. Sally later enters a room down the hall and sees Marie fellating Roger. Back in the showroom, Ed tells Don the companies at the event love his talent and will shower him with awards but, because of the letter he wrote against Lucky Strike, will never hire him. Don looks stunned. As he returns to the table and rejoins Megan, her parents, and Sally, they each look crestfallen.

Back at Don’s apartment while everyone is sleeping, Sally sneaks out in her pajamas and calls Glen. He asks her how the city was and she replies that it's “dirty”.

• "At the Codfish Ball" at AMC
• "At the Codfish Ball" at IMDb