When you are looking at downloading tv shows from the internet using BitTorrent there are a number of resources that are very useful.
CAT is a website that lists the air dates of tv shows around the world. If you register you can even set your local timezone.
www.tv.com is a website that provides overviews, episode informaiton and much more details on most TV shows from around the world. If you find a TV show that you have never heard of before then this is your TV guide to determine whether it is worth grabbing.
Both of the BitTorrent clients we suggest have the option to automatically download pre determined television shows so whilst you are at work the latest version of your favourite show is already downloaded and ready and waiting for you when you get home.
You can read a tutorial on how to download tv shows automatically with the Azureus BitTorrent client here and with the uTorrent BitTorrent client here.