Are there complete rankings for current TV shows in North America? I already tried:
IMDB. It doesn't enable filtering of results, in my case to shows that are currently broadcast.
Metacritic. But for 'Returning Series', it neglects some TV shows, like the TNT show 'The Last Ship' is neglected and the ABC or Global TV show 'Rookie Blue.'
Rotten Tomatoes. It doesn't list all returning shows.