|320 - The Unearthly|
|Air Date||December 14, 1991|
|MST3K Director||Jim Mallon|
|Movie Director||Boris Petroff|
|Cast|| John Carradine|
|Preceded by||319 - War of the Colossal Beast|
|Followed by||321 - Santa Claus Conquers the Martians|
|“||The story you're about to see is true. No names were changed because no one was innocent.||”|
Four children decide to better themselves through posture, with help from their teacher Ms. Martin. Tommy wants to have good health, Jimmy wants to stand straight and tall, Jane wants to grow tall, and Mary wants to look pretty. All four children develop outstanding posture in the end.
Appreciating Our Parents
This is the story of a boy named Tommy, who can't do anything for himself. He rethinks his symbiotic relationship with his parents, and decides to become a "team player". And, he finds out what Mom and Dad do after he goes to bed.
- Narrator: Good night!
- Crow [As Tommy calling out to his parents.]: No! Help! There's an announcer under my bed!
- Narrator: And what about father? What does he do all day? Well he had a particularly hard job today.
- Servo: Dad pulls the lever at "The Big House."
- [Scene showing Tommy's Porky Pig piggy bank.]
- Narrator: Help save money. Remember, someone has to work to earn it.
- Servo: Get Porky some pants!
Professor Charles Conway (Carradine) is a mad scientist attempting to develop the proverbial fountain of youth by creating "the 17th gland". Ignoring scientific ethics, his research subjects are people who have no family and are under the impression that Conway can cure their depression. However, his research hasn't been successful and his subjects are turned into grotesque monsters. Some of Conway's patients begin to uncover his scheme and intend to stop him.
- Look for Tor Johnson's son Karl, who has a bit part in this movie as the largest mutant. 
- The bots make fun of "America's Funniest Home Videos", a show that Josh Weinstein worked for and that Trace Beaulieu would later write for.
- The Lobo character here (who can speak) was created by writers Mann and Black. He is a different character than the mute Lobo created by Ed Wood Jr. in Bride of the Monster and Night of the Ghouls. Screenwriter Jane Mann was the wife of director Boris Petroff.
Prologue: The Satellite of Love crew decides to make an entry for America's Goofiest Home Videos.
Segment One (Invention Exchange): Crow, who was char-broiled during the video shoot, is identified by his dental records. The Mads demonstrate some hard pills to swallow, and Joel and the Bots create a random assortment of celebrity-inspired products.
Segment Three: The SOL crew does a tribute, "The Many Faces of Tor Johnson".
Segment Four: The Bots make up their own board game out of the leftovers from other board games, and model it after the twisted house from the film.
Stinger: Tor announces it is "Time for go to bed!"
- Although there were episodes in the first season that had two episodes of “Radar Men from the Moon,” this is only the second time in the history of the series that we have had two shorts (the first was 315- Teenage Caveman). They did it one more time in season six.
- The Rhino DVD version had alternate takes of the host segments.
- "What's the word? Thunderbird! What's the price? 40 twice."
A reference to the ad campaign by the fortified wine "Thunderbird".
- "I've turned her into a Sleestak!"
The Sleestaks were a race of lizard people in the TV show Land of the Lost.
- "That's not writing, that's typing."
Truman Capote's reaction to Jack Kerouac's novel "On the Road".
- Commercially released on VHS by Rhino Entertainment in August 1997.
- Commercially released on DVD by Rhino in April 2003 as part of The Mystery Science Theater 3000 Collection: Volume 3, a 4-DVD set with The Atomic Brain, The Side Hackers and Shorts Volume 2.
- Commercially released by Shout Factory as a DVD single in August 2011.
|preceded by: Season 2||MST3K Season 3||followed by: Season 4|
|1991 - 1992|
|301||Cave Dwellers||1991-06-01||309||The Amazing Colossal Man||1991-07-27||317||The Saga of the Viking Women...||1991-10-26|
|302||Gamera||1991-06-08||310||Fugitive Alien||1991-08-17||318||Star Force: Fugitive Alien II||1991-11-16|
|303||Pod People||1991-06-08||311||It Conquered the World||1991-08-24||319||War of the Colossal Beast||1991-11-30|
|304||Gamera vs Barugon||1991-06-22||312||Gamera vs Guiron||1991-09-07||320||The Unearthly||1991-12-14|
|305||Stranded in Space||1991-06-29||313||Earth vs the Spider||1991-09-21||321||Santa Claus Conquers the Martians||1991-12-21|
|306||Time of the Apes||1991-07-06||314||Mighty Jack||1991-09-28||322||Master Ninja I||1992-01-11|
|307||Daddy-O (episode)||1991-07-13||315||Teenage Cave Man||1991-11-09||323||The Castle of Fu Manchu||1992-01-18|
|308||Gamera vs Gaos||1991-07-20||316||Gamera vs Zigra||1991-10-19||324||Master Ninja II||1992-01-25|