A few select cast members from Mad MenJon Hamm, Christina Hendricks, January Jones, and Jessica Paré — visited talk show Katie this week to talk about this season of their hit show, and Katie Couric couldn't resist putting Hamm in the hot seat over why Don "can't keep it in his pants." Watch to see Hamm's funny response, along with Jones and Hamm addressing the work it takes to make Jones's character, Betty, look heavier than usual.