Collider.com- X-Files scariest episode
https://collider.com/the-x-files-scariest-episode/
I've mentioned this episode before from season 2- "Die Hand Die Verletz" as Mulder and Scully investigate a murder of a teen done by an occult ritual performed by teachers at the high school. It's cool to see this episode recognized as it's one of the best of the series and has some amazing scares to it.