Ep 21. The Letter

Jerry's signature neuroticism and paranoia are on full display in this episode as he becomes increasingly distraught over a mysterious letter he receives in the mail. At first, he tries to brush off the missive as a harmless piece of mail, but when its contents start to eat away at him, he enlists the help of his anxious friend George to decipher its meaning.

As they attempt to decode the letter's message, they become convinced that it is a scathing critique of Jerry's character and behavior, prompting him to confront everyone in his inner circle, from Elaine to Kramer, to find out who is the culprit behind its composition.

Meanwhile, Elaine is dealing with her own emotional turmoil as she becomes infatuated with an irresistibly charming and handsome man, only to discover that he has a peculiar obsession with a particular commonplace feature of female anatomy.

Kramer is up to his usual shenanigans, getting involved in a bizarre scheme to invest in the controversial business of "keeping pets at the zoo," while George, always one to look for shortcuts in life, attempts to cheat his way to success by taking advantage of a bizarre loophole in a company's frequent flyer program.

With its wildly unpredictable plotlines, sharp wit, and endlessly relatable characters, "Seinfeld" proves once again in this episode why it remains a timeless classic of television comedy.