If you are not watching Downton Abbey you really should be. I was so excited when I found out it was playing on PBS. I was sucked in within the first 5 minutes. The first season opens in Spring of 1912 so the costumes are gorgeous, especially the hats. And Highclere Castle, where it is filmed, is exquisite. I also LOVE Maggie Smith.
You can watch it online the day after it premiers on PBS here.