Have you seen Mad Men?
If not, I suggest renting/ordering/Netflix-ing the first two seasons and getting hooked on it before the upcoming start of Season 3.
It's addictingly good. Having worked in an advertising agency, it's pretty interesting to see how they portray the high-power ad agencies of Madison Avenue in 1960s New York. A lot of things haven't changed!
I'm finishing up Season 2 through my Netflix now, just in time for the new season premier on August 16th. Make sure to watch!