In the third-season opener, Salvatore and Don take a business trip out of town. Pete Campbell and Ken Cosgrove worry about the changes at Sterling-Cooper and how the changes will impact them.

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 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.

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.

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

Betty tries her hand at local politics. Don is forced into thinking about the future. Peggy receives a luxurious gift.

The firm celebrates as they hit a milestone. Peggy and Paul compete to secure the same account.

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.

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.

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.

The agency's Christmas party is nearly spoiled by the late arrival of a surprise and not-so-welcome visitor.

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

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

Don and Pete disregard Roger's plans in order to land a new client.

Peggy clashes with her new creative partner; Don pitches under unusual circumstances.

A deadline disrupts Sterling Cooper Draper Pryce.

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

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.

An unannounced visitor at the Francis home rattles Betty.

Sterling Cooper Draper Price employees resort to scuttlebutt after an agency wide meeting is called.

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

Don and Peggy are faced with life-altering decisions

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

As Sterling Cooper Draper Pryce tries to build upon its current business, Peggy is given new responsibility. Don and Harry indulge a client. Betty contemplates her mortality after seeing a doctor.

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

Lane attempts to land an account with Jaguar Cars, leading to a altercation with Pete. Pete and Trudy host a dinner party in the suburbs.

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

Don is honored at a banquet for the American Cancer Society, but finds his professional reputation has been damaged. Sally lends a hand to a relative. Megan's parents come to visit from Canada.

Megan has second thoughts about her future at Sterling, Cooper, Draper, Pryce. Peggy lashes out when she's inadvertently put in the uncomfortable position of having to lie. Pete's effort to protect an acquaintance doesn't turn out quite like he expected.

Don attempts to regain his creative spark, but undermines a member of his staff while doing so. Roger pursues some new clients, and in the process, hurts Jane. Betty displays her pettiness when she reveals a distressing secret to Sally.

Harry finds himself in an uncomfortable position after reconnecting with Paul Kinsey who has joined the Hare Krishnas. Lane takes drastic and unethical measures to get out of financial trouble. Don spends an afternoon with Joan to get her mind off her marital problems.

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.

Roger seeks to expand his affair with Megan's mother. Pete has a "last" encounter with Beth with lasting repercussions. Megan struggles to find acting work and asks for Don's help getting an audition. Peggy still seeks Don's approval.