What kind of man are you? You’re weak, spineless, a man of temptations. But what tempts you? You’re a porky fellow, long in the waistband. Yours is a sweet tooth. You may stray, but you’ll always return to your dark master: The cocoa bean!

Cosmo Kramer derives George’s ATM code.
Cut to Kramer, P.I., in which the perennially rumpled detective is employed by an apparently wealthy but forever shadowy figure who generally leaves Kramer with plenty of free time to wander around figuring stuff out as it pleases him.
Pitch it as TV’s first show-within-show spinoff; every episode transpiring slightly off to the side of a Seinfeld episode and forever going to commercial when Kramer finds a key clue or wraps up the case… just in time to make his crazy entrance back into Seinfeld’s apartment.