This season, on Mad Men:

Kirsten Dunst joins the cast as Bitsie, Betty Draper’s heretofore undisclosed sassy younger sister! WATCH as Bitsie sweeps in and upends everyone’s lives — for the better! SMILE as Bitsie actually pays attention to poor Bobby Draper! APPLAUD as Bitsie tells Betty that she’s a terrible parent and makes horrible life choices! NOD when Bitsie asks Don where he gets all his Brylcream! LAUGH when Pete Campbell falls in love with her and she tells him that he’s already got enough on his plate without adding a dame like her to it! ENJOY KIRSTEN DUNST AS SHE’S MEANT TO BE: cute, and in vaguely-period costumes.