DH and I have been watching one episode of a series every night for months now. Our favorite series have been:
Endeavor (this is available through PBS and Amazon)
Non Occidere/Thou Shall Not Kill (An Italian show-with subtitles but so worth it. We were in Italy for the summer in 2019 so it's great to revisit places but also excellent acting and storyline)
Professor T (A Belgian crime drama--watching this now)
Fargo (Seasons 1-3, haven't started with the new season yet)
Broadchurch (a British show,police drama)
Baptiste