The Tales from the Darkside introduction is one of the most famous and iconic opening narrations in the history of television.
The opening/closing theme to the series was performed by Donald Rubinstein (who co-wrote the theme with Erica Lindsay). Donald (brother of Laurel Productions' founder, Richard P. Rubinstein) had worked on scores for Laurel Productions in the past, such as the films Martin and Knightriders. His previous works qualified him to try his hand at the theme for Tales from the Darkside, and the haunting composition helped define the series as a separate entity from Creepshow. George Romero wrote the narration. As in the case of The Twilight Zone and The Outer Limits, the series begins each episode with a montage of images—in this case, several shots of a forest and countryside—accompanied by a narrator (the late Paul Sparer) delivering a foreboding voice-over.
"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."
The Darkside is always there waiting for us to enter; waiting to enter us. Until next time, try to enjoy the daylight.