What happened in “Mad Men” that shocked Burt Manning? At our September dinner at Michael’s restaurant, the former chairman of J. Walter Thompson shares a story about the earliest days of email and something that happened almost 20 years later, on the very first episode of “Mad Men." Linda Yaccarino, Jim Rosenfield, Joe Uva, Stuart Elliott, Linda Boff and Allison Arden were among the Legends in the room. Watch the video above for the full story.