The narrative centers on a series of gruesome and bizarre deaths occurring in the Boston subway system.
The creatures possess high concentrations of calcium and emit a bright green bioluminescence. "The X-Files" Medusa(2001)
They are microscopic organisms that entered the system via sea water. The narrative centers on a series of gruesome
More information on the in Season 8 A list of other aquatic monster episodes from The X-Files "The X-Files" Medusa (TV Episode 2001) - IMDb "The X-Files" Medusa(2001)
If you'd like, I can provide more details about this specific episode. Let me know if you want to know: How the agents the organisms