Mad Men riveted audiences with a cliffhanger finale in season three, as Don Draper's professional and personal lives unexpectedly imploded.
This season, the series' breakout ensemble cast continues to captivate as they grapple with an uncertain new reality.
In season three, Mad Men's unflinching look at the human condition continued as characters faced the realities of dramatic change in the country - from the birth of civil rights to the assassination of a president - and in their personal lives.
Whether it was corporate politics, homophobia in the workplace or the frustration of betrayal, they dealt with an unsettling loss of the familiar.
Audiences were stunned by the self-destruction of protagonist Don Draper, including a confrontation with wife Betty that forced him to reveal the truth about his past and identity, and the resale of Sterling Cooper by British parent company Putnam, Powell and Lowe (PPL), which left its partners on the brink of a new beginning.
Created by Emmy and Golden Globe winning executive producer Matthew Weiner, Mad Men Season 4 is anchored by an award-winning ensemble cast, including Golden Globe winner Jon Hamm, January Jones, Elisabeth Moss, Vincent Kartheiser, Christina Hendricks, John Slattery, Jared Harris, Rich Sommer, Aaron Staton, Robert Morse and Kiernan Shipka.