The OG (80's) Battlestar Galactica. Source: I saw it as a kid and I still have the trading cards lol

Like others have mentioned, it's the original Battlestar Galactica. As a product of the late 1970's, its production was steeped in the aesthetics of the time. It sits in this pocket near the end of the disco era, and dared to stand out by featuring episodic sci-fi when mainstream television was dominated by variety shows (e.g. Sonny and Cher, He-Haw). Serious, campy, scmhaltzy, fun, sometimes great, sometimes awful, and apparently too expensive to avoid cancellation, it stands on its own two feet as its own phenomenon while inviting endless comparisons to classic Trek.

It also brought us this banger/nightmare-fuel: https://www.youtube.com/watch?v=Hr1TEXAvuGg

It also spawned this Italo-disco track by Giorgio Moroder himself (not on the show, but more of a fan work of sorts): https://www.youtube.com/watch?v=51bjtPN_VqU

Edit: we don't talk about the cost-reduced, dehydrated, fire-sale budget "Battlestar 1980".

OG Battlestar Galactica 1978