WMG: The Twilight Zone

The episode "The Invaders" features the final, fatal voyage of United Planets Cruiser C-57D.
It's the same model; I just thought this sounded good. After the adventure on Altair IV, the ship is destroyed by a giant raging old woman in a barn.

Rod Serling is Anthony Fremont from "It's a Good Life".
As an adult, he decided to use his abilities to travel time/space/reality/whatever, and torture and madden those he happens upon for his own amusement. He then narrates as he watches his awful work.
  • On the other hand, he can be nice when he feels someone needs happiness, or he simply gets tired of being evil sometimes.

Henry Corwin was always the real Santa Claus.
Until the end of 'Night Of The Meek' he had lost his way in the modern world and forgot his true identity.

"Queen of the Nile" is one of T'Pau's nightmares.
Her refusal to warn Kirk what the Kal-i-fee actually entailed wore on her more than she demonstrated. Then, one day, during a fever or in another situation that might induce hallucinations, she began to dream the scenario all over again — herself as an old woman, watching a young man walk into a deathtrap completely unaware. After a while, her conscience manifested with her dream avatar trying to warn the victim, but because of her guilt, the dream would never let her succeed.

Global 33 didn't really travel through time.
The plane traveled into alternate universes: one where the large dinosaurs never died out, and another where history progressed identically to our own, but everything happened a few years later chronologically. That's why Manhattan Island and the Hudson River were recognizable to the pilots when they caught sight of the sauropod, even though the geography would have been completely different in our own Mesozoic Era.
  • Science Marches On: Continental drift was still not fully accepted by the scientific community in the early 1960's. In its current form it was a relatively new theory, and writers educated in the 1940's and 1950's would not necessarily have been familiar with it.
    • Even before continental drift was accepted, no geologist would have expected the coastline or rivers to look the same millions of years earlier, as erosion and the re-sculpting of the landscape by water were some of the first long-term geological processes to be understood by science.

Rod Serling is the Wandering Jew.
He is cursed to wander through space and time until the return of Christ, observing the missteps of others and rendering judgement on them—sometimes favorably, sometimes not so much. The fact that Serling himself was Jewish is incidental to this.

The Twilight Zone is very real.
It is not another universe, or some identical planet on the mirror-side of ours. It is not a state of mind. The Twilight Zone is a communal system that facilitates art, commerce, romance, politics... Anything that people are capable of in the "regular world". It is a system not designed by sinister or benevolent alien intelligences, but by the very people who fall into it. It is beyond a door unlocked by the key of imagination. A dimension of sight and of sound and of mind. A world of shadow and substance, of things and ideas. A world where the bizarre is commonplace and horrors are vaunted, where hubris can be punished by the whim of technology and a king can be brought low by the condemnation of strangers in an instant. You may recognize this system, this dimension, as The Internet. But a few with the perspective to recognize the signs understand that "logging on" is tantamount to entering... The Twilight Zone.
  • And the Mandatory Twist Ending: The reason that so many people now spend almost all their time online is that we have, in our folly, created and mass-adopted a Lotus-Eater Machine. That you're in the clutches of right now. Go ahead. Tell yourself you can get out. Shut down the device you're reading this on and tuck it away for a day or two... if you can.

On Judgment Day, it will be more bearable for the humans from "The Monsters are Due on Maple Street" than for the aliens.
The humans are far from blameless, but the aliens who created the temptation in order to destroy them...

"The Invaders" were wearing Big Daddy suits.
The design is similar, the weapons are vaguely similar, and they put up as much of a fight as you could expect from a Big Daddy against something fifty times their size. The suits are also what protected them for so long, all things considered.

Rod Serling is a Time Lord.
Because nobody else has brought up this tired old meme on this page, and yet the user who posted this theory doesn't even like Doctor Who.

Episodes that don't take place After the End or The End of the World as We Know It happen in the same universe, which is the main one.
  • "The Invaders"
  • "The Odyssey of Flight 33"
  • "Night of the Meek"
  • "Third from the Sun"
  • "I Shot an Arrow into the Air"
  • "The Nightmare at 20,000 Ft."

In "The Monsters Are Due On Maple Street", Tommy was an alien plant
His talk about alien invaders was the spark that got people turning on each other, without which they could easily have simply become frustrated and harmlessly confused. At the climax of the episode, Charlie accuses Tommy and that's the last we hear on the matter before the situation devolves into chaos. He was right. "And suspicion can destroy..."