"Breaking Bad" has been on the air for five seasons now, but it's only really seemed to dominate water cooler discourse over the past 18 months or so, with Bryan Cranston's Emmy-winning turn as Walter White stealing the show. As his intimidating alter ego "Heisenberg," Walter sports a shaved head, glasses and a little mini-fedora as he navigates his way through the drug trade. It's an easy costume that will be easily recognized by most 18-49 year olds. Just don't bring any meth to your friend's party or to the Halloween parade. 

-Dave Lewis