Re: 7X11 The Crimson Horror(Grading/Discussion)(SPOILERS
It wasn't. Nor did it feature scarlet alien leeches.
But it did have a sociopath creating a group of 'perfect' people to repopulate the earth after dropping poison on it from a great height. And a damned near identical "rocket launch" scene with the good guys in the launch bay when the rocket goes up.
"So, Mulder, this supposed clandestine source who's contacted you how do we know that he's not just another crackpot whose encyclopedic knowledge of extraterrestrial life isn't derived exclusively from reruns of Star Trek?"