Ep 1. Bart of Darkness

In The Simpsons season 6 episode 1, Bart of Darkness, the Simpson family's summer vacation plans fall apart after Homer's proposed trip to the beach is vetoed due to cost. As a result, the family is forced to stay at home and endure the sweltering heat.

Bart, feeling bored and restless, decides to pass the time by spying on the neighbors with his trusty pair of binoculars. However, his snooping leads him to believe that his neighbor, Ned Flanders, has committed a terrible crime, an assumption that quickly snowballs into a delusion that Flanders has murdered his wife.

Bart convinces himself that he is the only one who can solve the mystery, but accidentally breaks his leg and must stay inside with a cast for weeks. Though initially unhappy with his situation, Bart eventually begins to enjoy his time alone, using his spy kit to keep an eye on the neighborhood from his bedroom window.

As Bart becomes more and more convinced that Flanders is a murderer, he begins to fear for his own safety. He barricades himself inside his room, convinced that Flanders is coming to get him. Meanwhile, the rest of the Simpson family has become oblivious to Bart's plight, assuming that he is simply enjoying his summer vacation.

Throughout the episode, the tension builds as Bart's paranoia reaches a boiling point. His isolation and obsession with the alleged murder drive him to the brink of madness, culminating in a dramatic confrontation with Flanders.

The episode is a humorous exploration of the dangers of jumping to conclusions, as well as a commentary on the alluring nature of conspiracy theories and delusions. It is also a testament to the enduring popularity and cultural significance of The Simpsons, which continues to entertain audiences more than 30 years after its debut.