Hey, is that Angela Chase's mom? It is! Bess Armstrong played mother to Claire Danes on ABC's short-lived teen drama "My So-Called Life," and it was a nice surprise to see her in Season 5 of "Mad Men" as Jane's psychiatrist, who famously dosed Roger and Jane with LSD.
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