Everyone goes a little mad sometimes, so why not on Halloween? If you're a huge Mad Men fan, there's no better way to show your love of the '60s drama than by dressing up as your favorite character on the show. And since there are plenty of distinctive personalities, you have a lot of options for dressing up. Are you a Joan, a Megan, a Bob Benson? Here's how to put together all the looks of the show's major characters.