Season 1 episode 8 (IMDB), episode 9 (Paramount), or episode 11 (Memory Alpha). Anyway, we get a complete copy of Earth, the failed longevity experiment, bonk bonk, and Kirk wrenching a kid off a desktop. Beyond that, no explanation surrounding AN EXACT COPY OF EARTH! Zero, zip, zilch, nada.
Side query: What’s considered the “official” episode breakdown?
The Roman planet was essentially an exact copy of Earth too. Apparently it just happened a lot back later.
So then, what over-powered being from Earth (or otherwise interested party) is making these duplicates? And why?
Maybe Q is being a dick again.
A solid catchall. If only he’d go away.
Hodgkin, I guess