I'll obv allow separate Treks. I'm very aware how many there are to choose from, so feel free to add runners up.

BEST: Firefly
Runners up: TNG, Fringe, Invasion. ...and there's one I can't remember properly. Think it was set in the 50s, in the US, during an alien conspiracy. I didn't see enough to be sure, but what I did see was amazing.

WORST: Babylon 5