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.

Peggy is given a difficult assignment. Roger's work problems provide new opportunities for Don, and Pete grows more frustrated. Betty finds a new outlet for her growing dissatisfaction.

As Thanksgiving approaches, Don's work responsibilities interfere with his domestic life. Peggy is given a new opportunity, provoking the ire of some of her colleagues. Betty makes a startling discovery.

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.

Trouble arises on the set of a commercial; Harry tries to gather support for a controversial sponsorship; Betty and Don try to appease a client with a friendly dinner.

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

Don has to deal with issues between a TV comedian and his wife; Joan finds Don the perfect secretary.

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 buys a new car; Pete, Harry and Ken strategize to attract new business; Don's secretary makes a grave error; Cooper has a new piece of art in his office.

Peggy contributes on a church project; Duck and Don try to create market appeal for a foreign beer brand; Harry recruits assistance to help with the workload in his department.

Freddy Rumsen disappoints his team during a pitch. Pete finds an opportunity at the office to exploit while Don proves his loyalty to an old friend. Betty finds a welcome distraction in Sara Beth.

Betty visits her father; Paul's girlfriend tries to convince him to prioritize his duties; Pete's mother disapproves of his and Trudy's idea.

Don meets up with an old friend; Pete's personal life presents problems; Joan brings her boyfriend to the office.

The office scrambles without Don; Betty learns some disconcerting news.