Fashion Freeze Frame: Mad Men Season 3

"Betty's look is more modern than in previous seasons," says Mad Men costume designer Katherine Jane Bryant. "Here, Betty is shopping in town in a linen dress with a polka dot silk sash."

"This vintage crepe sheath with rose appliques is different for Joan," says Bryant. "She's entertaining at home in this scene, and we rarely see her out of the office."

"Peggy is playing with the boys now, so I like to maintain that perky, conservative style in a vest, blouse and pleated skirt," says Bryant.