So all this talk about aliens and everything has made me fall back and realize the potential for:
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Stargate: 2000 (Alternate Universe/Alternate Universe)
Having recovered the titular alien device in the early 1900s, the Stargate sat un-used for decades (though being used once, secretly).
However, in the 90s, a new enemy emerged from the mysterious wormhole: the Goa'uld. These parasitic beings have been subjugating the Jaffa people for centuries, and the recent emergence of the Humans does not bode well for them.
Enter the SGC, buried deep under Cheyenne Mountain and run by the USAF, the teams only known by their number designation (SG-#) travel to the many planets opened by the Stargate, exploring new worlds, battling alien threats to humanity, and creating important extraterrestrial allies.
It's not the best job in the world, and there are some days where things just don't go your way, but someone has to do it. And at least it's a pretty damn cool one.
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Stargate: SG-1 is by far one of my favorite shows, and I feel like it wouldn't be hard to pair T2k and SG1 with a little elbow grease (I'm thinking a tweaked Dark Conspiracy Dimensional Walking Device for a Stargate).