Air date: January 27, 1961
A woman (Agnes Moorehead) living in an old shack with no modern appliances is cleaning up her house for the night. Suddenly, she hears a loud noise coming from above her and after it drones on for a little while, it stops.
The woman goes up to her bedroom and hears something on the roof. On the top she finds a small UFO that drops down a stairwell and a tiny alien in a spacesuit emerges. Terrified, the woman goes back into her shack and starts hiding.
She hides in behind the hatch only for the alien to follow her into there. She opens a hatch which it falls down and she closes it.
After some time she goes back down terrified that there is another alien there shooting at her. And when she gets back to the inside she finds a small instrument running on electricity and bruises on her arm and chest where she was shot.
She finds one alien back in her bedroom so she tries to hide from it until she gets a broom to hunt it down. After prodding around, she finds an alien behind her door.
The woman continues to hide until she finds a knife. Once again said alien has followed her and hid in a cabinet, which she promptly closes, but she hears it break out.
As she's retreating, one alien attacks her foot with a knife. Screaming in pain, she now realizes these aliens intend harm on her.
She decides to end it by capturing one of the aliens firing at her in her bed sheet and beating it on her dresser till it dies.
She finds the other alien who blew a hole through her wall prompting her to follow it to the roof.
The woman goes to the roof with a hatchet and starts beating the UFO to death. After no dialogue the whole episode, we hear the commander of the spaceship notifying central control that the planet is inhabited by giants and this makes the woman beat it harder despite them saying they have no counter attack. After a few final swings, the UFO has been destroyed.
As the woman sags in relief, the audience finally gets a clear look at the damaged ship, and the alien writing on it: U.S Air Force Space Probe No. 1. The spacesuited aliens were humans, and the woman a giantess.
- Bottle Episode: The whole episode takes place in a small, dark cabin with just one cast member. The space ship is a recycled prop from Forbidden Planet, and the invaders themselves are simple hand puppets.
- Bullying a Dragon: It doesn't end well for the astronauts harassing and attacking the woman.
- Creator Cameo: The only dialogue we hear in "The Invaders", other than Rod Serling's narration, is that of director Douglas Heyes. He provides the voice of the alien at the end.
- Foreshadowing: The lack of dialogue is cool, but is also crucial to The Reveal.
- Human Aliens: The planet is presumably populated by human-like giants.
- Humans Are Bastards: The ending after a set up for Aliens Are Bastards.
- Humans Through Alien Eyes: Apparently we're creepy little space dudes that like to attack old ladies.
- Lilliputians: Subverted. It appears for most of the episode that the invaders belong to a race of tiny aliens but it turns out that they are actually normal sized humans in a world of giants.
- Minimalist Cast: Only one actor, who plays the harassed woman.
- Our Giants Are Bigger: The ending reveals that the woman in the cabin must be, oh, fifty feet tall or so.
- Something Completely Different: Given the nature of this episode, this is the only time that Rod Serling gave his opening monologue at the start of the prologue segment, rather than at the end. Also, it's one of the few times that he is clearly seen walking on and off screen.
- Silence Is Golden: Other than Serling's narration and several lines at the very end that are used for The Reveal, there is no dialogue in this episode.
- Square-Cube Law: The woman in the cabin violates it rather flagrantly.
- Tomato Surprise: It is revealed in the final scene that the seemingly tiny aliens are from Earth and that the woman belongs to a race of giants.
- Twist Ending: The invaders were humans all along.
- Wham Shot: The United States Air Force's name on the saucer, revealing that the invaders were from Earth.
- Rod Serling: These are the invaders. The tiny people from the tiny place called Earth, who would take the giant step across the sky to the question marks that sparkle and beckon from the vastness of the universe only to be imagined. The invaders, who learned that a one-way ticket to the stars beyond has the ultimate price tag. And we have just seen it entered in a ledger that covers all the transactions of the universe, a bill stamped 'paid in full,' and to be found on file in the Twilight Zone.