In searching for a TV show to keep me occupied in the face of all recent shows taking on a 10 episode per series run I settled on Stargate. With SG-1 and 10 series, SG:A at 6 series and SG:U at 2 series, and a few movies, and all a healthy 20+ episodes a pop (maybe not SG:U, I haven't checked on that one) it'll keep me for a while (was a decent few months back when I binged it in Uni). My memory was that SG-1 took a bit to get going, but it gets into some elements pretty damn quickly and many things I thought were in later series are all within the first dozen or so (e.g they're almost off the bat with the Alpha gate which I thought wasn't around for a while.
It's interesting seeming them slowly build up the mythology of the show, and the various "rules" of the stargate and playing around with that. To me it's in the pantheon of Star Trek and Star Wars it just never really got its due. It covers usual sci-fi tropes from human experimentation, human rights, war crimes, prime directive (there isn't much of one here ), and identity etc. And that's the first series.
I like it cos it knows where to be serious, and where to be silly and let itself sort of poke fun at itself (the entire "Wormhole Extreme" stuff for example). Jokes about "Macgyvering" systems together, or "we can't just send a computer virus to their mothership". It's also late 90s early 2000s too with its netscape navigator n 90s haircuts.
I might jump on to Farscape after (which is even sillier, but also very imaginative), which has a bit of crossover in the cast between the two shows too. Claudia Black, who'll many of you know as Morrigan from Dragon Age, one of the Asari (iirc the half-krogan asari), Chloe in Uncharted, Tess Everis in Destiny, etc plays a big role in Farscape and a later recurring role in SG-1.