S3E7 · Seven Twenty Three

Complete story — includes the ending

Don assists Miss Farrell in helping the students make a camera obscura to view the solar eclipse of July 20, 1963. Betty hosts a campaign to prevent the installation of a huge water tank that will drain the scenic local reservoir, and she meets with Henry Francis to discuss the project. Peggy receives an expensive scarf from Duck, and decides to visit him in-person to return it. She tells Duck she is not interested in changing agencies, but their meeting unexpectedly brings them together romantically. Don's attempt to land the Hilton Hotel account backfires when Connie's lawyers refuse to work with him unless Sterling Cooper signs him to a contract; Don is reluctant. Angry and drunk, Don picks up a young couple hitchhiking their way to Niagara Falls; he follows them to a roadside motel and swallows two of their phenobarbital pills, briefly experiencing a vision of his father before being knocked out by the man. The next day, Don discovers that the couple have robbed him of everything but his car. Returning to the office, Bert blackmails Don over his theft of the "Don Draper" identity and forces him to sign the three-year contract with Hilton.