'Mad Men' Stars Christina Hendricks, January Jones, John Slattery And More In Their Early Roles Before They Were Famous (VIDEO)

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 lead 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 towney in "Love Actually" and many more early moments from the cast of "Mad Men," including what Bert Cooper was really doing in the '60s.

Check out the videos in the slideshow below and let us know where you recognized the "Mad Men" stars from before Sunday's Season 5 finale.

Tune into the season finale of "Mad Men" on AMC on Sunday, June 10 at 10 p.m. ET.