Sonarr is a free app that allows you to automatically download TV shows from around the world.
This is a reliable application that runs as a service on your machine. The user interface has a slight learning curve, but once Sonarr is set up correctly, you will not need to use the interface that often.
To use Sonarr, you select the TV series that you wish to download.
Sonarr will then scan for new episodes of your selected TV shows. If a new episode is available, it will download that episode automatically via Usenet or torrent.
Sonarr also makes it easy to download entire TV shows seasons. You can click on any season, and Sonarr will download all available episodes at once.
Sonarr works in tandem with a Usenet download client or a torrent client. I recommend using it with SabNZBd.
Sonarr is available for Linux, Windows and MacOS.
There’s also an application called Radarr which is similar to Sonarr. It is for tracking movies instead of TV shows.