Angel
The Buffy spin off moved the vampire with a soul to Los Angeles and quietly became a different, better show than most people remember. Where Buffy was about surviving growing up, Angel is about a grown man trying to atone for a century of atrocities and learning that redemption is not a finish line but a job. Angel Investigations, a detective agency that helps the helpless, gives the series a noir spine Buffy never had, and the early case of the week years use the city's neon rot far better than most LA dramas.