As Thanksgiving approaches, Don’s work responsibilities interfere with his domestic life. Peggy is given a new opportunity, provoking the ire of some of her colleagues. Betty makes a startling discovery.

Don is tormented as pieces of his secretive past begin to haunt him. Peggy’s new success at work, and resulting boost in confidence, threaten her office relationship. Salvatore Romano gets…

Paul hosts a party at his apartment and introduces someone special to his Sterling Cooper colleagues. Peggy visits her family for dinner. Despite a conflict of interest, the Sterling Cooper…

A taboo office romance is revealed. At a brainstorming session, Peggy proves to be more than a secretary, opening up new opportunities for her at Sterling Cooper. Meanwhile, Rachel faces…