The mythology (also called mytharc) refers to a series of episodes in The X-Files that primarily focuses on an overarching story, involving the efforts of Mulder and Scully to investigate and expose the conspiracy (whose international proponents are collectively known as the Syndicate) to suppress knowledge of the existence of extraterrestrials.
Common themes include:
- The continuation of the X-files as well as Mulder's and Scully's assignment to the X-Files Unit
- Revelations about the Mulder and Scully family
- The presence of black oil, Alien Bounty Hunters and/or the Syndicate
- Deaths of, or betrayals by, key supporting characters
It should be noted that some key mythology characters also appear in Monster of the Week episodes; notably, Deep Throat, X and the Cigarette Smoking Man each appear in episodes which involve government activities. Furthermore, as his role expanded, Walter Skinner appears in more Monster of the Week episodes.
This list of mythology episodes is taken from official sources, The X-Files Mythology range of DVDs and the book The Complete X-Files: Behind the Series, the Myths and the Movies. Differences between the DVDs and the book are shown, where appropriate.
- Season 1:
- Season 2:
- Season 3:
- Season 4:
- Season 5:
- Season 6:
- Season 7:
- Season 8:
- Season 9: