"Mad Men" -- "What is wrong with you people?" a bewildered woman asks during the two-hour Season 5 opener of this acclaimed drama. "You're all so cynical. You don't smile. You smirk." She's referring to the hustlers and con artists who populate Don Draper's (Jon Hamm) 1960s-era ad agency, and, of course, she's right, but that's exactly how we prefer them. Finally back after a brutally long 17-month hiatus, these characters are now wondering what the future holds as they struggle to adapt to the changes brought on by the cultural upheaval of their times. Then again, some things never change: "Mad Men" is still as sleek and seductive as ever. 9 p.m. Sunday, AMC.