Shortly after the launch of a satellite from a space shuttle, the satellite collides with an UFO in front of the crew's eyes. Because of an upcoming election, some politicians try to hide the crashed UFO inside Hangar 18.
- Hangar 18 is a 1980 film that was released to capitalize on the UFO interest of the era. Although it flopped rather badly (reportedly earning a gross of only $6 million), it tantalized those who saw government cover-ups of UFOs (such as the Roswell incident) as dirty laundry needing to be aired. 
- Heavy-metal band Megadeth performed a song named "Hangar 18" based on this movie.
- In 2017, Hangar 18 became a RiffTrax Presents production.
Prologue: In the shortest host segment ever, Joel introduces the film, and then it's movie sign!
Segment One: A meteor shower is about to strike the Satellite of Love! Joel explains the tragic consequences if the hull is punctured and the ship loses its oxygen: "No more Kibbles n' Bots, and no mid-morning pleasure stimulations!" Crow tells him to lighten up. (This segment appears on the MST3K Scrapbook tape.)
Segment Two: Joel purges Crow's memory, dumping all non-essential rememberences. "Every Punky Brewster episode? Dump! The Lyle Waggoner Penile Implant Show? Dump!"
Segment Three: Joel taps into Crow's brain, and shows him his first memory—the moment when he was first turned on. In the bit, Joel explains that "CROW" is actually an acronym, which stands for "Cybernetic Remotely-Operated Woman." Crow, alarmed to discover that he's really female, begins to panic ("Thirtysomething is on! I need some chocolate!") until Joel reveals it's all a joke. (This skit appears on the MST3K Scrapbook tape.)
- The opening host segment/prologue is the shortest host segment in the history of the show.
- The scenario of facing a meteor shower and it's consequences would almost have been revisited in Mst3K the movie (but due to the extreme meddling it received, has been cut).
- Joel hits his head on something in the prologue.
- "He was in 'Teen Wolf', wasn't he?"
Teen Wolf was a 1985 movie starring Michael J. Fox.
- "He's drinking Helsinki Formula!"
Helsinki Formula was a baldness remedy endorsed by Robert Vaughn in a series of infomercials.
- "I thought you meant H.R. Giger."
Artist H.R. Giger is best known for designing the title creatures from the Alien film series.
- "I said 'lunch', not 'launch'!"
|preceded by: --||MST3K Season K||followed by: Season 1|
|1988 - 1989|
|K00||The Green Slime||Not aired||K08||Gamera vs Guiron||1989-01-08||K16||City on Fire||1989-03-19|
|K01||Invaders from the Deep||1988-11-24||K09||Phase IV||1989-01-15||K17||Time of the Apes||1989-04-02|
|K02||Revenge of the Mysterons from Mars||1988-11-24||K10||Cosmic Princess||1989-01-22||K18||The Million Eyes of Sumuru||1989-05-07|
|K03||Star Force: Fugitive Alien II||1988-11-27||K11||Humanoid Woman||1989-01-29||K19||Hanger 18||1989-05-14|
|K04||Gamera vs Barugon||1988-12-04||K12||Fugitive Alien||1989-02-05||K20||The Last Chase||1989-05-21|
|K05||Gamera||1988-12-11||K13||SST- Death Flight||1989-02-19||K21||The "Legend of Dinosaurs"||1989-05-28|
|K06||Gamera vs Gaos||1988-12-18||K14||Mighty Jack||1989-03-05|
|K07||Gamera vs Zigra||1988-12-31||K15||Superdome||1989-03-12|