Smoking marijuana may be legal here in Washington state, but it's still a federal crime. That certainly hasn’t stopped some of the people that we spend the most time with from lighting up: popular characters on television. Mad Men has even seen leading man Don Draper get stoned this season. What's the history of getting high on the small screen? Is casual pot use getting more common on TV? Robert Thompson is director of the Bleier Center for Television and Popular Culture at Syracuse University. He talked with David Hyde.