'Mad Men': Behind the Scenes on Set

"Mad Men," the smash hit AMC show about the world of advertising on Madison Avenue in New York in the 1960s, is the most acclaimed TV series of its time. The sin, swagger and salesmanship of the plot has earned the show four Emmys for "Outstanding Drama Series," and it is heading into its fifth season. "Nightline" was granted exclusive access to the actors on set for behind-the-scenes tour. (Chris McIntire)