Definitely Mad Men. The high quality and attention to detail are something incredibly rare in television.
For the uninitiated: the story follows the main character, Don Draper, a New York advertising executive in the 1960’s. Don struggles to deal with the memories of his horrible childhood and the things he did to try to escape from it. His increasingly heavy drinking and philandering lead to the collapse of his personal life and career, until he reaches rock bottom and realizes he no longer needs to hold up the carefully crafted image of himself which has become so heavy.
My favorite sceneDon, having been fired from his job, takes his kids to see the place he grew up and has a moment of understanding with his daughter, Sally. This is the kind of writing that shows you can say a lot with almost no dialogue.