|320 - The Unearthly|
|Air Date||December 14, 1991|
|Movie Director||Boris Petroff|
|Cast||John Carradine, Tor Johnson, Allison Hayes, Myron Healey, Sally Todd|
|Preceded by||319 - War of the Colossal Beast|
|Followed by||321 - Santa Claus Conquers the Martians|
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 have great posture in the end, but did they really win when you think about it?
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...
Professor Charles Conway (Carradine) is a mad scientist attempting to develop the proverbial fountain of youth by creating "the 17th gland". Ignoring all aspects of 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 zombies. Some of Conway's patients begin to catch on to 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 worked for and that Trace would later write for.
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. Tthe 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!"
- "What's the word? Thunderbird! What's the price? 40 twice", 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.
- 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.
- The DVD features alternate takes for the host segments from this episode.
|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|