Stargate is 'hey every planet has a sci-fi trope on it. We got tropes from Twilight Zone, from Star Trek, golden age sci fi, pulp sci fi, probably even some of that steampunk shit. Also we shoot aliens with machine guns. Science.'
Daniel Jackson does not approve of your analogy.
nanotech, greys, time travel, space opera, prophecies, dopplegangers, clones, turned into children, religion vs science, appearances are deceiving, virtual realities, elder races, yo mamma
Well, that was 150 hours well spent.
Is it perhaps a curse that any series running long enough will descend into predictable tropes?