Robert Morse

Season 1 takes place between March and November 1960, beginning with new secretary Peggy Olson starting her first day at the advertising firm Sterling Cooper. As the season unfolds, the mysterious backstory of enigmatic ad man Don Draper is revealed, as are the growing confidence and success of Peggy.

Season 2 expands on Peggy's rise in the workplace and the marital strife between Don and Betty Draper, as Don's infidelities further intrude on his family life. An unknown acquaintance of Don Draper is introduced, with whom Don is corresponding in secret.

Season 3 takes place six months after the conclusion of Season 2 and ends in December 1963. It chronicles the end of the "Camelot era" as the characters go through immense change in their professional and personal lives.

Season 4 takes place between November 1964 and October 1965, at the new and considerably more modern advertising agency of Sterling Cooper Draper Pryce. Don Draper is suffering from an identity crisis. As he falls deeper into existential despair, he begins regularly meeting with women of loose moral character, and faces debilitating alcoholism.

Season 5 takes place between Memorial Day 1966 and spring 1967. The season explores Don Draper's new marriage to Megan, which leads him to ignore his work at the Sterling Cooper Draper Pryce advertising agency. Meanwhile, Lane, Pete, Roger, Joan, and Peggy learn that it is "every man for himself" in their personal and professional lives, as they each face painful new beginnings.

Season 6 takes place between December 1967 and November 1968. It begins with Don and Megan taking a trip to Hawaii for the holidays. Sally's friend visits the Francis family, a comedian torpedoes Peggy's Super Bowl ad campaign, and Roger gets some bad news about his mother.

Season 7 begins in January 1969, several weeks after the Thanksgiving 1968 ending of season 6, and ends in July 1969, with characters dealing with the dynamics of lives and offices being split between New York and Los Angeles.