Corporate changes at the firm have an affect on Pete and Ken. Meanwhile, Sal tags along with Don as he makes a business trip to Baltimore, where both of the men fall prey to the powers of seduction.

Betty's father makes an unexpected visit. The Drapers got out for dinner with the new stuffy British boss and his snooty wife. The firm agonizes over whether to give in to an unusual request from a client. Roger takes over the planning of a wedding. Peggy is left greatly affected by her personal involvement in a campaign.

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.

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 and Betty decide to act after becoming concerned over Sally's behavior. Always the opportunist, Pete tries working a new angle into his business dealings. And Betty is strangely effected by an odd dream she had.

A surprise visitor shows up at Sterling Cooper. Sally is unnerved by something. Joan receives surprising news.

Betty becomes involved in local politics. Don starts thinking about the future after a troubling incident and Peggy receives an exquisite gift.

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

Don and Sal just can't seem to satisfy their clients. Betty decides to throw a fundraiser.

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

The firm welcomes back an old client. Joan and Greg make plans for their future and Betty and the kids take trip.

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.