Five seasons with many time-travel episodes. Four (marked with ¤) were written by Richard Matheson, one was by E. Jack Neuman (“Templeton”), one by Reginold Rose (“Horace Ford”), and the rest were by Serling (including “What You Need” based on a Lewis Padgett story with prescience only and no real time travel, “Execution” from a story of George Clayton Johnson, “A Quality of Mercy” from a Sam Rolfe story featuring a young Dean Stockwell, and “Of Late I Think of Cliffordville” from Malcolm Jameson’s “Blind Alley”).
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.

Variants

(1)
  1. The Twilight Zone by Rod Serling (30 October 1959).
    2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . written by Rod Serling