Here are 11 of the most iconic and interesting science fiction stories — from across various media — which reveal the strange dimensions of dreams and sleep. “The Function of Dream Sleep” by Harlan EllisonHarlan Ellison in the 1960s. “The Function of Dream Sleep” is in the Harlan Ellison collection Angry Candy. To really dive deep into sci-fi sleep, you could read and discuss only PKD stories for the rest of your life. CBS/ParamountIn an entirely different Star Trek sci-fi sleep take, this Voyager episode from Season 4 is all about aliens that can only exist in dreams.