There is a fifth dimension, beyond that which is known to man. It is a dimension as vast as space and as timeless as infinity. It is the middle ground between light and shadow, between science and superstition, and it lies between the pit of man's fears and the summit of his knowledge. This is the dimension of imagination. It is an area which we call the Twilight Zone. [link]
Do the 80's or '02 versions have any stories by writers from the original show? Remakes/sequels don't count.
For example, The Twilight Zone Radio Dramas (have you heard of that? It's great) have a lot of episodes that are based on scripts written for the original '59-'64 show that never made it into production.