It would be understandable to describe “Space Seed” as a prequel to Star Trek II: The Wrath of Khan, given the way that film ...

Altman, Ellison wrote a letter on December 1, 1966 to the Science Fiction Writers of America, only four months before the episode he'd written for Star Trek, "The City on the Edge of Forever" debuted.

who turns out to be the classic time-travel machine known as the Guardian of Forever from the original Star Trek episode “The City on the Edge of Forever.” For viewers, this may seem like the ...