Ken Cosgrove Returns For Tonight’s Final-Four Episode Of MAD MEN!! Read the full article on AICN I am – Hercules!! Last week. On “Mad Men.” * Amy Ferguson, who played Joan’s hot hippie babysitter, was also in “Inherent Vice,” also set in 1970. * We learned Lou Avery is running Sterling Cooper West between visits to Hanna Barbara. * We learned Don’s Manhattan penthouse was on the market for $85,000. * Thirtysomething Joan Harris hooked up with St.