From Mac Update: TVShows is a Mac OS X application that automatically downloads torrents of your favourite shows. You no longer need to manually download torrent files, or find a working RSS feed for each show you wish to subscribe to. TVShows does that for you.
Simply select your subscriptions and set your preferences from within the TVShows application and we'll take care of the rest. TVShows uses a lightweight background process which automatically launches at a regular interval (chosen by you) to check for new episodes.Download it at TV Shows App.