- A classic Mulderism.
- Mentioning of a family member.
- Either Mulder or Scully is seen NOT in jacket and tie/suit-dress,etc.
- Skinner is shown - And his head ISN'T all sweaty.
- Scully's hair doesn't look very red.
- Mulder puts his hand on Scully's shoulder/back.
- Euther Mulder or Scully call each other Dana or Fox.
- CSM is shown without a smoke.
- Scully is asked how she is, and she DOESN'T reply "I'm Fine."
- Mulder and Scully share a meaningful glance.
- Either Mulder or Scully goes on a date.
- A Scullyism.
- Appearance of a family member of Scully or Mulder.
- Scully or Mulder in seen in their underwear/nude/they take off or put on their clothes on camera.
- Mulder drops/loses his gun.
- A character that reuccured for more than three episodes dies.
- Mulder dies.
- Mulder and Scully kiss on the lips.
- Scully initiates a kiss (on lips or not) between her and Mulder.