"Apocalypse Cow" is the seventeenth episode of the nineteenth season of the American animated television series The Simpsons.

Her father, Cletus, mistakenly believes it as a token for Mary's hand in marriage, and attempts to get the two married.

The show's main character is quickly placed in a life-threatening situation and pleads with the viewers to help him survive by buying the new Trans-Clown-O-Morphs cereal.

Throughout the following weeks, Bart takes good care of Lou and helps him become stronger, while also bonding with him and growing to love him.

Bart tries to convince Marge and Homer to buy the bull, but knowing by experience how expensive it is to care for a large animal, they refuse.

That night, Bart hears mooing as he lies in bed and believes it to be a hallucination caused by his inability to help Lou.

He starts yelling in fear, and Lisa arrives and says it is simply his subconscious telling him to stop eating meat.

However, the mooing is suddenly replaced by clucking noises, and Bart discovers that it was only a CD of Tress MacNeille's "Anguished Animals III," placed by Lisa, in an attempt to turn him vegetarian.

They discover that Lou, who has been fed growth hormones, is now much bigger, so they use a forklift to pick him up and carry him away (though not without some trial and error).

When Bart says goodbye to Lou at the airport, he used the same speech Rick said to Ilsa at the end of Casablanca; moreover, the music theme on this scene is "La Marseillaise".

[5] In a 2008 interview, Matt Groening named the episode his favorite of the series, citing the part with Homer in the slaughterhouse as the scene he liked best.

[6] Jeff Westbrook won a Writers Guild of America Award in the animation category for writing the episode.