Peggy and her new creative partner don’t see eye-to-eye; Don pitches a client under an unusual set of circumstances.

Don and Pete disregard Roger’s expectations in an effort to land an important new client.

When Pete receives an edict from Roger and Lane, he finds himself confronting a personal dilemma.

Don makes a jaunt to Acapulco, while back at the office, Lane and Joan get into a serious disagreement.

A last minute visitor threatens to spoil the agency’s Christmas party.

Don’s secretive ways lead to the cancellation of an interview with a major newspaper which would have thrust the new agency into the spotlight; the copywriters struggle with a bathing suit account; Pete and Peggy work together to secure money from a client; Roger attempts to find Don a girlfriend. This episode takes place in late November of 1964.

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.

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.

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

Sterling Cooper celebrates a big milestone. Elsewhere, Peggy competes with Paul for an account.