Episode - 4F01\\
First Aired - 12/15/1996

After stealing Superintendent Chalmers' car emblem off his new Honda Accord, Nelson is sentenced to janitorial work. While Lisa is serving detention for snickering at Nelson spraying Groundskeeper Willie with a hose, she becomes fascinated with and develops a crush on the bully. Meanwhile, Homer takes an autodialer that was recently used in a telemarketing scam and creates a telemarketing scam of his own.

YMMV tropes can be found [[YMMV/TheSimpsonsS8E7LisasDateWithDensity here]].
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!!Tropes:
* FiveFiveFive: This occurs when Homer demonstrates the autodialer for Marge.
* ActuallyPrettyFunny:
-->'''Skinner:''' I'll tell you something that's not so funny. Right now, Superintendant Chalmers is at home crying like a little girl. ''(Among the subsequent laughter of the students, he chuckles.)'' I guess it is a little funny.
* AllGirlsWantBadBoys: Explored in this episode, with Lisa coming to the conclusion that what she had with Nelson was an infatuation, and that it would never work out, no matter how much she tries to change him.
* AllLoveIsUnrequited: Poor Milhouse
* ALessonLearnedTooWell: Homer pays his debt to society from his telemarketing scam... with another telemarketing scam.
-->''"Hello, this is Homer Simpson, a.k.a. Happy Dude. The court has ordered me to call every person in town to apologize for my telemarketing scam. I'm sorry. If you can find it in your heart to forgive me, send one dollar to Sorry Dude, 742 Evergreen Terrace, Springfield. You have the power."''
* ARareSentence: When Bart finds out that Lisa has invited Nelson over to their house as a friend.
-->'''Bart:''' I'll probably never say this to you again, but... you can do better!
* ARiddleWrappedInAMysteryInsideAnEnigma: Lisa describes Nelson as "like a riddle wrapped in an enigma wrapped in a vest".
* BaitAndSwitch: It appears Chief Wiggum has tracked down Nelson and shot him ("Chief, no!"), but it turns out he was actually taking out Homer's autodialer, and Wiggum has no idea where Nelson is.
* BigNo: Skinner's reaction to Nelson's NoodleIncident listed below.
* ICanChangeMyBeloved: Discussed; played straight with Marge and Homer (Marge insists that she ''has'' changed Homer, despite the evidence that he's still an often-inconsiderate slob) and averted with Lisa and Nelson (Lisa comes to realize that she could never change Nelson).
* LeadIn: Homer's subplot begins with him attempting to shoplift by trying to disguise candy as sprinkles on a self-serve donut.
* NoodleIncident: Who knows what Nelson left in the bird bath after the attack on Skinner at his home?
** Knowing Nelson, he probably used it as a toilet.
* NotMeThisTime: Skinner's search for the H from Chalmers' Honda naturally begins with Bart.
* PetTheDog: Nelson actually does help Lisa with the line's punishment.
* ReallySeventeenYearsOld: Kearney yelling at Superintendent Chalmers and Principal Skinner to get away from his car (in yet another example of Kearney being [[OlderThanTheyLook older than he looks]])
* ShoutOut: The title refers to ''Film/BackToTheFuture'', when George [=McFly=] introduces himself to Lorraine Baines as [[{{Malaproper}} "Her density"]] fixing it to "Her destiny".
* SpitTake: Lisa confesses to Milhouse that she has a crush, leading Milhouse to drink milk suavely before she finishes, "...on Nelson." Milhouse proceeds to spit milk back into the carton, ruining it with force.
-->'''Nelson:''' Way to drink, pointdexter!
* TemptingFate: Defied when Skinner gets hit in the face with a dozen eggs after looking in Bart's locker.
-->"Rather than tempt fate, I'll just move along."