What is the status of the slug-like creatures that were found to be controlling the minds of some of Starfleet's highest-ranking officials?
Did the 'Doomsday Machine' really come from another galaxy? Or is its origin a little closer to home?
How can a gaseous intelligent creature be made of dikironium?
What is the explanation for the change in Klingon physiology from 80 years ago to now?
Why HAVEN'T The Borg assimilated the Alpha Quadrant?
Commander Fox Mulder and Commander Dana Scully are assigned by the Federation Bureau of Investigation (FBI) to delving into the mysteries posed by these questions, as well as many others involving -
... starship disappearances...
... spontaneous evolution of alien species...
... duplicate Earths...
... speculation that V'ger was a Borg construct...
... relationship between the galactic barrier and the ESP abilities of various alien species...
... the location of the tribble home planet...
... time travel paradoxes...
The U.S.S. J. Edgar Hoover is an efficient and mobile base of operations for the agents.
Captain Walter Skinner