Apocalypse Cow/References

Cultural references

 * The episode's title is a reference to the film Apocalypse Now, which the show has referenced and spoofed many times.
 * The chalkboard gag is a reference to 's catchphrase, "A person's a person, no matter how small", in the book .
 * The cartoon Trans-Clown-O-Morphs is a parody of .
 * Bart drives the harvester and turns manure into DVDs of .
 * When is being sent off, Bart says, "Here's lookin' at you, cud", a reference to 's famous line, "Here's lookin' at you, kid", from .

Trivia

 * Spiderpig is seen at the wedding.
 * According to Marge, Bart "still sits in the driveway and pretends to drive the car".
 * Brandine Del Roy was 13 when she married Cletus and she had already been divorced 4 times before that.
 * The animal sound tape Lisa played for Bart said "" on the cover and when Homer is entering the killing floor of the slaughterhouse he hears a voice say "You are now entering the killing floor", Homer then comments "Hmm, that sounds like Tress MacNeille". Tress MacNeille is a voice actress on the show who voices lots of extra-characters as well as some recurring characters such as Dolph, Agnes Skinner and Mona Simpson.
 * This is the first time that Lisa has tried to trick somebody to convert to vegetarianism.