Don continues to conceal his complicated personal life, even in the face of Roger's invitation to open up.

Pete returns home from his honeymoon excited about his new marriage but conflicted about his past encounter with Peggy.

Pete Campbell oversteps the mark when he pitches an idea for ad campaign to the head of Bethlehem Steel without telling Don Draper. Draper wants him fired but learns a lesson in corporate politics. Pete's wife wants to buy a Manhattan apartment but he has to approach his cold and distant parents for a loan. Pete's in-laws, however, are more forthcoming.

Don and Betty Draper have an argument when it becomes apparent that he doesn't want to spend Thanksgiving with her family and she plans on going only with the children. He also learns some information about his brother Adam. Pete Campbell confirms that he has landed an account from his father-in-law for a new skin care product called Clearasil. He objects however when Don gives the account to Peggy Olson, whom he has just promoted to junior copywriter. Peggy proves her mettle in auditions for the weight loss device but later is feeling unwell and goes to the hospital where she is given some shocking news. Don comes up with a brilliant presentation for Kodak on a new wheel-like storage device for a slide projector that he dubs The Carousel.

Don and Betty try to keep up appearances as they go to Betty's parents after her dad has a stroke. Peter has a long-dreaded meeting with his mother before he and Kinsey leave for a convention in Los Angeles.

Freddy returns with a valuable new client, the firm reluctantly throws a Christmas party for its most important client, and Don prepares for his first Christmas away from his children.

Don makes a bold, desperate move to save Sterling Cooper Draper Pryce, but the other partners are furious with his actions. Meanwhile, Sally's psychiatrist suggests that she is improving, but Betty is skeptical.

Don takes the kids to California and comes back with a surprise announcement. Meanwhile, Betty fires the kids' nanny before they move out of the old house over one questionable incident, and Peggy gets a shot at a new account.

Don gets a visit from the in-laws and his children just as he's about to receive a prestigious award and tries to save the Heinz account. Meanwhile, Peggy and her boyfriend take the next step in their relationship.

Lane's entire world comes crashing down after getting busted for forging Don's signature on a check, and Sally experiences an awkward rite of passage while spending the weekend with the Drapers.

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 decides to sell his apartment, Joan stumbles into a relationship while on a trip to Los Angeles, Glen tells Betty and Sally that he is going to Vietnam, and a copywriter gets in trouble for his rude behavior to a client.