Suzanne Farrell

Don has a strange relationship with beatniks, hippies, and other free spirits: he's drawn to them, but he also holds himself above them as a realist. It's just bad news to get involved with your kid's teacher, but Suzanne seems to embrace Don as readily as the complications of her own life. Don even seems willing to take his affair with her further, but the plot cuts it off. Not super emotionally healthy — I mean, cheating on your wife with your daughter's third-grade teacher, right? — but on the Draper scale, that's not even that bad. (It's also, like much of the third season, not that interesting.)