4. Joan Holloway Harris
Showcase Episode: "Christmas Waltz"
How in denial are we about the end of Mad Men? We keep watching the Everclear video Christina Hendricks starred in, back in her grunge-goth days. ("One Hit Wonder," it was called. Not a bad tune!) Right from the start, Joan had plenty of smoldering rage. In the episode where she played the accordion and sang "C'est Magnifique," it raised all these questions: Namely, what kind of pageant-princess hellhole did this woman emerge from? There's so much nobody knows about the suffering Joan has endured, including a bonus marriage she never mentioned until a few weeks ago. But Joan's got the sneer everybody else is scared of — especially Roger, who'll never get over her.