For seven seasons, Jon Hamm played the hard-drinking, womanizing, 1960’s-era advertising executive Don Draper on the hit series Mad Men, a role that earned him two Golden Globe awards and an Emmy. In this week’s “Sunday Sitdown,” Willie Geist gets together with the actor to talk about the legacy of that show and his steady mix of comedy and drama since then, all leading up to his childhood fantasy of starring in the highly anticipated new Top Gun sequel alongside Tom Cruise.