Darkstorm
Multiple realities
(covers information from several alternate timelines)
Darkstorm tales were literature read by Makull's species on a Class M planet in the Delta Quadrant. They were associated with nonexistent elements like demons.
In an alternate 2371, a young boy named Latika saw Kathryn Janeway and Tom Paris appear out of thin air and screamed. He went to an officer and told him what had happened. However, the officer dismissed his story and told him that he was reading too many Darkstorm tales. (VOY: "Time and Again")