Downton Abbey enmeshed drama, historical events, and romance with each other in a way that few other television shows could. The story of the Grantham family and their lives after they lost their heirs in the Titanic disaster captivated fans, especially because the new and enigmatic Matthew Crawley stepped into the aristocracy out of nowhere.
Source：https://www.cbr.com/downton-abbey-best-romantic-relationships/
