Easy subtitle downloader for series.
sudo apt-get install python-pip python-qt4
sudo pip install bs4 requests subscraper
subscraper /path/to/the/movie/file.mkv
A QT interface will open and now you can search and download the appropriate subtitle.
This will only work if you are using Nemo. Right-clicking a video will give you the option to Download subtitle.
# Install extension and restart Nemo
wget -N https://raw.githubusercontent.com/charmpitz/subscraper/master/subscraper/download-subtitle.nemo_action -P ~/.local/share/nemo/actions/ && nemo --quit