The X-Files is a really depressing show: a weird, obsessive loner takes on a pretty, fresh from med school doctor on as his partner and basically ruins her life.
In the first season, Scully has something of a social life and helping raise a godson and is fairly well adjusted. Meanwhile, Mulder is running off onto army base's and seeing UFOs before getting his memory wiped. Then they see all sorts of terrifying stuff from Fluke Men living in septic tanks to incest-based families to massive radiation sickness to tunnels leaking goo to aliens gestating inside human hosts.
Their parents die over the span of nine years (the fathers under especially dramatic circumstances).
Scully gives birth twice and eventually loses both (one is taken from her by the government, the second is written out in the second film). She also gets cancer for a time. Moreover, she has her face repeatedly rubbed in the fact that despite her logical mind, Mulder is always right (and they even write an episode about exactly that) and it always IS a monster/alien.
Scully's brothers disapprove of her work and of Mulder, and with their disappearance we can assume she chose Mulder over her flesh and blood relatives. That's kinda cold, no matter how you hack it.
Mulder struggles with suicide, briefly. He may or may not be a bastard son fathered by an affair his mother had (I honestly gave up trying to figure that one out), has a half-brother who ends up being a massive burn victim and perpetually blames himself for his sister's alien abduction before finding out she was kidnapped and brutally murdered by a serial killer going door to door. He himself is eventually abducted and experimented on by aliens.
By the last film, Mulder and Scully live alone in a house in the middle of Nowhere, Canada. Scully is a doctor and Mulder grows crazy-beard and cuts out newspaper articles to perpetuate his own conspiracy theories. He ends up being a Truther in some ways: validated by his own conclusions and less interested in investigation. Scully is too tired and frankly too fucking cranky to go back to running around with a flashlight in the dark and instead, attempts to heal a terminally ill child. Because that's SO much more gentle a life choice.
They never marry.
They do, however, go to a tropical island in a rowboat in the end credits of the second film, further isolating themselves from the world.
So, the truth is out there because they're too depressed and worn out to keep looking and have decided they want to be left the fuck alone for good?
