Joan got a much-needed night out on the town when Marley Shelton stopped by as Joan's old friend Kate. Shelton has been acting in TV and movies since she was a teen, but we know her best for her work with director Robert Rodriguez, in 2005's "Sin City" and the "Grindhouse" zombie flick "Planet Terror."
Do You Recognize These 'Mad Men' Guest Stars?
The halls of Sterling Cooper & Partners have been filled with a lot of familiar faces lately. Here are more than 20 "Mad Men" guest stars we recognize from previous roles in TV and movies. — Dave Nemetz, Yahoo! TV