09/13/2013 11:40 EDT

'The X-Files' 20th Anniversary: Most Shocking Episodes


This week marks the 20th anniversary of the premiere of "The X-Files," the Vancouver-produced show that earned its huge popularity through pushing paranormal shock value to new heights.

FBI Agents Fox Mulder (David Duchovny) and Dana Scully (Gillian Anderson) pursued supernatural forces so disturbing that it's a wonder some of them made it to television.

There was the time they tracked down a murderous fetishist who lusted after women's hair, or the frightening mutant in the New Jersey sewer system that infected people with flatworms. But they really met their match in the Peacocks, deformed brothers with an eerily creepy method for carrying on the family line.

To celebrate the show's 20th anniversary, we've compiled a list of most shocking episodes of its nine-year run. We limited our selections to scary moments and omitted the show's great plot twists.

This slideshow contains MAJOR SPOILERS:

Photo gallery 'The X-Files': Most Shocking Episodes See Gallery