The original run of The Twilight Zone covered five seasons and saw a variety of actors, but only one appeared in all five seasons, and it’s not the creator and host, Rod Serling. Among the best TV shows of all time, and one of the most influential as well, is The Twilight Zone, which premiered on CBS in 1959. Every episode of The Twilight Zone covered a different story, with elements of horror and sci-fi and usually paranormal elements too, though some episodes strayed from that and went for a more lighthearted tone.