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The AMC hit's fourth season fully delivered on the promise of new beginnings, as Don Draper & Co. struggled to get Sterling Cooper Draper Pryce off the ground. But it was Don's downward spiral into drunken debauchery that reminded us that the more things change, the more they stay the same. As skillfully written and acted as ever, the season ended with Don proposing to his secretary. The season posed the question: "Who is Don Draper?" We still don't know. We're still eager to find out.