Until the episode that featured Manos: The Hands of Fate (1966) the writers of MST3K considered Monster a Go-Go (1965) to be the worst film ever featured on the series. It's still counted among the 'top' worst films to be shown on the series.
The host segments in this episode are unusual in the Joel era in that none of them have anything to do with the movie, or each other. The Mystery Science Theater 3000 Amazing Colossal Episode Guide entry explained that since the film was about nothing, the segments would be as well.
Dr. Forrester's idea for Johnny Longtorso predicted the trend towards "Build-A-Figure" collectibles, Iin which "prestige" action figures aimed at collectors would come with parts to assemble a special extra figure.
While watching "Circus on Ice," Crow mispronounces 'karaoke.' Pronouncing it "kuh-row-kee." Instead of the proper pronunciation, "kar-a-o-kee."
In the host segment when they mention "The Piña Colada Song" by Rupert Holmes, they fail to mention the actual name of the song, which is "Escape."