Only time will tell what will happen to Joan, Don, Peter, Roger and the rest of the beloved "Mad Men" characters in Sunday night's Season 5 finale (10 p.m. ET on AMC). But instead of attempting to draw conclusions about what's to come, HuffPost TV is taking a look back at the stars of "Mad Men" before the AMC drama was a glimmer in creator Matt Weiner's eye. Want to see Christina Hendrick's (Joan Harris) sexy stint on MTV's late-night soap "Undressed" in 1999? Or another "Mad Men" female lede in a teen lesbian drama with Mischa Barton (plus, Piper Perabo and Emily VanCamp)? How about John Slattery (Roger Sterling) playing a politician with a urination fetish on "Sex and the City" a decade ago? There's also Aaron Staton in a sweater vest on "7th Heaven" before becoming Sterling Cooper account executive Ken Cosgrove, January Jones (Betty Draper) as a kinky townie in "Love Actually" and many more early moments from the cast of "Mad Men," including what Bert Cooper was really doing in the... - daniel