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 Draper is shaken when his past life comes back to haunt him. After his picture appears in a local newspaper, Adam Whitman, a man who claims to be his younger brother, approaches him. Don, or Dick as his brother knows him, initially denies everything but in the end admits to having taken on a new name. He refuses however to have anything to do with him and tries to buy his silence. When one of the ad men gets a short story published, Pete Campbell is frustrated that his own stories have yet to see the light of day. When his wife approaches an old beau to see if he will publish the stories, he has an interesting proposition for her.

The Agency is looking to land an advertising contract to promote tourism to Israel. Don and his team try to come up with a theme but know so little about the country that they're stumped. So Don calls Rachel Menken to see if she has any ideas. Roger Sterling is getting tired of sneaking around with Joan Holloway and suggests she should get her own apartment but she knows better. Peggy comes up with an advertising concept during a testing session for a new line of lipsticks and she's subsequently asked to write copy.

Pete Campbell and Peggy Olson start an office romance. Peggy's copy for the lipstick account goes over well and the men in the firm congratulate her. A new telephone receptionist, Lois Saddler, takes a liking to Salvatore Romano but his own interests seem to lie elsewhere. Don Draper gets an unexpected bonus from Bert Cooper and wants to take Midge on a surprise trip to Paris. She seems too involved with her beatnik friends however. Don reflects on his unhappy childhood and in flashbacks he reveals some life lessons he learned early on when a hobo spent the day working on the family farm in exchange for a meal.

Election night arrives and the staff of Sterling Cooper has a party while watching the returns. The election is close and it's obviously going to be a long night. Now a senior partner in the firm, Don Draper must hire a new head of account services, a post that Pete Campbell yearns for. Aware of Draper's secret past, he tries to strong-arm him into giving him the job. With his secret out, Don panics and he asks Rachel Menken to run away with him. Regaining his composure, Don calls Pete's bluff leading to a confrontation with Bert Cooper.

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.

On Valentine's Day, the staff of the Sterling Cooper Advertising Agency is hustling and checking out the newest office equipment. Don and Duck clash over an account, and Betty hears from an old friend.

A plane crash causes the firm to go after the account for the airline involved and drop the smaller airline they have an account with. Peggy pays a visit to her mother and sister, who are now guardians of a child.

Don and Duck try to bury the hatchet, and Peggy attempts to join in on the execs' after-hours meetings. Also, Duck receives a family visit at the office.