Don has a big meeting with Connie about their future relationship. Betty is the beneficiary of some interesting advice and Pete has a serious sit-down with some clients.

A deadline disrupts Sterling Cooper Draper Pryce.

Don receives a troubling letter. A risky venture entails a new future for Peggy. Roger gets an unexpected phone call. Pete butts heads with Cutler.

On election night, the Sterling Cooper staff pulls a rowdy all-nighter while watching the returns. Pete's ambitions cause him to directly challenge Don. Don remembers his past as a soldier in the Korean War.

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.

Pete asks Joan to make a personal and moral sacrifice to ensure the company lands the Jaguar account. Don becomes furious after learning of the impact Megan's new profession will have on their life. Feeling unappreciated, Peggy attends lunch with Freddy Rumsen, who encourages her to make a move.

Lane's shameful secret comes to the surface with dire consequences. Don recaptures his hunger for success, and Sally experiences a major milestone.

A former client makes a return; Betty and her kids go on a trip; and Joan and Greg make plans for their future.

In the midst of a crisis, Don runs into an old friend.

Don and Peggy are faced with life-altering decisions.

Don and Megan work out some of their issues, Roger and Pete butt heads, and Joan has a run-in with a house guest.

Don receives a reward for his work. Joan butts heads with her co-worker on an account. Faced with a big decision, Roger dodges.

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

Sterling Cooper receives a surprise visitor; Sally has been spooked by something (or someone); and Joan receives some shocking news.

Don comes up with a big idea, Roger asks Joan to help him fix a clerical error and Peggy has difficulties casting for a commercial.

Joan and Peggy deal with high-jinx in the office.

Peggy has a tough time during a particularly formidable pitch. Don calls on a potential client. Roger and Jane have an experience with LSD.

Peggy determinedly collects research for a pitch. Pete is invited to join an exclusive club. Joan looks forward to spending time with her friend.

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.

Peggy's taste in men proves questionable. Pete has to make a big decision about his career and a candidate makes a big impression on Don.

An edict from Roger and Lane puts Pete in a personal dilemma.

An unannounced visitor at the Francis home rattles Betty.

Don is preoccupied with keeping Sylvia's son from being drafted, Peggy has a rat in her apartment, Don and Ted bury the hatchet, Pete has a problem with his mother's new nurse, and Sally makes an accidental discovery about her father.

Don renews his battle with Ted after seeing his relationship with Peggy, Sally interviews at a boarding school, and Pete discovers Bob Benson's background.

Don has trouble sleeping. Pete is blindsided by a difficult friend. Facing a new challenge, Henry arranges a family reunion.