Plus: Can you tell what year this season is set in?
Next gallery »Which shows earned the most Emmy nominations? 'The Pacific,' 'Glee,' 'Mad Men,' more
« Previous galleryMeet the 'Big Brother 12' houseguests
Peggy Olson has a new hairstyle
Peggy Olson (Elisabeth Moss) has a new hairstyle in season four of "Mad Men."
Photo Credit: AMC