TV Shows that were canceled too early

Firefly
Robbery Homicide Division

Kevin McKidd in Journeyman (2007) comes to mind for me. I really liked it.

https://m.imdb.com/title/tt0948538/?ref_=m_nmfmd_act_25

Brooklyn Bridge (1991-93)
https://en.wikipedia.org/wiki/Brooklyn_Bridge_(TV_series)

My Name is Earl had a fun/interesting premise. I guess 4 seasons should be enough. And I haven't seen all the episodes, but the end still felt abrupt.

Freaks and Geeks

Patriot starring Michael Dorman; a dark comedy series on Amazon about an underfunded CIA operative who feels tortured about the terrible things he does in the effort to prevent nuclear proliferation in the Middle East. He preserves his mental stability by bearing his soul in acoustic guitar songs that his handlers hope no one will hear or understand. A clip:
https://youtu.be/DwVwQHFEoWg

A hilarious clip of his CIA training on close quarters combat with guard dogs
https://youtu.be/YET1zPShbmE

Whiskey Cavalier it was a fun show that was a little different. Deserved more than a season.

New Amsterdam from 2008 another supernatural show about an immortal man only got one season.

Forever
Prodigal Son

So much lost potential there