Famed horror writer Stephen King contributed two stories to the series: "Word Processor of the Gods" and "Sorry, Right Number." Both have subsequently been reprinted in the author's anthology works.
The series originally aired as a pilot in October 1983 as "Trick Or Treat" starring Barnard Hughes. Apparently, this was before it became "Tales From The Darkside". The original broadcast wasn't intended as a episode of it until the "Tales From The Darkside" intro was tacked on future repeats of it.
Narrator: Man lives in the sunlit world of what he believes to be reality. But... there is, unseen by most, an underworld, a place that is just as real, but not as brightly lit... a Darkside.