DON DRAPER (Jon Hamm)
LAST SEASONDon realized the importance of family too late: First his brother hung himself, then his wife and kids left for Thanksgiving without him. UP NEXT Further exploration of Don's work-vs.-life struggle and his dark past. ''There are still a lot of holes in this guy's life,'' says Hamm. ''A lot of gray area.''
You've heard the AMC drama, which returns tonight for season 2, is one of the best new dramas on TV, but you've never seen it? Here's a crash course on who's who and what's what so far, and a preview of what awaits the ''Mad'' men and women now