Have you been hummin' it all night and day? I refer, of course, to "Zou Bisou Bisou," the innocent-but-dirty little French ditty made famous by Sophia Loren in the early 1960s. That the latest Mrs. Draper naughtily performed an x-rated version of the song at a surprise party for Don was just one of the surprises of the two-hour opener that, while filled with funny lines and visual gags, lagged at times (and presented some wildly unlikable characters.)

Welcome back, Mad Blog followers! It's been an impossibly long, long 17 months! But apparently the two-hour "Mad Men" opener this Sunday is so dazzling that it more than repays our patience with the toddler-aged wait.