Don has an encounter with someone from the past. Meanwhile, Roger increases Peggy's workload, and Joan comes to a momentous decision.

Peggy's family hosts a lunch for their church's new priest; Don and Betty enjoy a weekend together; Pete and Ken take a client out to lunch; the staff works to prepare for a last minute pitch meeting.

Pete returns from his honeymoon, excited about his new marriage, but conflicted about his past encounter with Peggy. After his business relationship with Rachel takes an unforeseen turn, Don attends a party which further illuminates his increasing dissatisfaction with his present life.

Don loses an account. Roger, stuck in the city for Labor Day weekend, attempts to cheer him up. Meanwhile, Joan has a night out on the town with her roommate.

Don decides to include Betty on a company business trip. Pete lends a hand to a neighbor in his apartment building.

There is trouble for Don and Sal in giving their clients what they ask for. Meanwhile, Betty hosts a fundraiser.

It’s Valentine’s Day, and the Sterling Cooper advertising agency is hustling to stay on top of its game and buzzing over the newest office equipment. Don and Duck find themselves at odds over an account. Betty reconnects with an old friend and once again finds herself struggling with car trouble.

Paul hosts a party at his apartment and introduces someone special to his Sterling Cooper colleagues. Peggy visits her family for dinner. Despite a conflict of interest, the Sterling Cooper agency aggressively pursues an airline account and Duck attempts to appeal to the client using an unorthodox approach.

Don's father-in-law pays a visit to his daughter's family. Peggy works hard on a campaign while the firm tries to decide if they will accommodate an unusual request from a client. Elsewhere, Roger plans a wedding.

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.

A taboo office romance is revealed. At a brainstorming session, Peggy proves to be more than a secretary, opening up new opportunities for her at Sterling Cooper. Meanwhile, Rachel faces her conflicted feelings for Don after he seeks out her advice on a new campaign.

Don and Duck try to make peace; Peggy tries to get into the executive's after-hours meetings; Duck deals with a family visit.

Don makes some new friends on his trip to Los Angeles; Peggy looks for romance; Duck ponders the future of Sterling Cooper.

Don and his father-in-law cross paths. Meanwhile, Peggy is in search of a new roommate; and a rich new client is excited to be doing business with the firm.

Don deals with a trade-paper interview but doesn't want to talk about himself. A manufacturer of a "wholesome" two-piece bathing suit wants to hire the firm but doesn't want anything too risque. Pete and Peggy try to secure more money for the firm.

Don continues to conceal his increasingly complicated personal life, even in the face of Roger Sterling's invitation to open up. Meanwhile, Peggy pines for the absent Pete still on his honeymoon while fending off the advances of several of the men of Sterling Cooper.

Pete's professional and personal lives become more complicated as he struggles to assert power in both. While facing pressure from his wife regarding a new apartment, he further alienates Don and endangers his own position at Sterling Cooper.

Peggy is forced to face some unpleasant facts about a client's discriminatory business practices. Don and Faye's burgeoning relationship is tested when Sally runs away from home and turns up at the office. Roger tries to rekindle his affair with Joan.

For the Draper family, life has changed. The children must adapt to a new home, a new brother, and a new stepmother. Don seems to have everything a man could want. However, Megan, still employed at the agency, has difficulty interpreting Don's expectations for a sex kitten at home and a prim and proper employee at the office.

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.

In 1960 New York City - the high-powered and glamorous "Golden Age" of advertising - Don Draper, the biggest ad man in the business, struggles to stay a step ahead of the rapidly changing times and the young executives nipping at his heels.

Don is tormented as pieces of his secretive past begin to haunt him. Peggy's new success at work, and resulting boost in confidence, threaten her office relationship. Salvatore Romano gets a little too close with a client.

The writers make an attempt to stave off late-night boredom during a mandatory overtime session. Roger throws a party as Joan and Greg host their own party. Sally has a run-in with Grandpa.

Sally's behavior causes concern for Don and Betty. Betty has an eye-opening dream that has a strange effect on her. Pete tries to work a new business angle in his dealings.

Don takes a trip. Joan has scheduling problems. Don and Lane get to know each other a little better.