Mad Men “Christmas Waltz” Season 5 Episode 10 airs on Sunday May 20 at 9/8c on AMC.

Mad Men review questions: It’s Christmas already?

Mad Men “Christmas Waltz” Synopsis: Christmas proves rewarding to many at the agency; Harry does a good turn for a friend. (Mad Men Episode Guide Season 5)

Photos of Jon Hamm and Christina Hendricks: AMC