We've made no secret of our love for AMC's Mad Men, so we're pleased to report that in its second season, which starts on Sunday, Don Draper and crew show no signs of the sophomore slump. The lowdown: The premiere's set on Valentine's Day, two years after we last saw our gray-flanneled antiheroes, as a slimmed-down Peggy hides her "secret," Sterling is back from heart attack, and Draper—sans mistresses, at least for now—quotes the poet Frank O'Hara, plunging deeper into existential angst. Against the backdrop of Jackie-O moving into the White House, all of Sterling Cooper is flummoxed by a curious invention called the "copy machine." Good news: The writing's still Cheever-sharp. Better news: There's as much change in the air as there is cigarette smoke.
Sunday, July 27, 10 p.m., AMC