Either way, the payoff for an entire show never fully happens.[/QUOTE]
Futurama does a pretty good job at continuity and payoff. There are numerous examples of things that occurred in past episodes, that if you go back and check you can see the foreshadowing. For example, Nibbler being the cause of Fry freezing himself in the first place. If you go back and watch the pilot, you can see Nibbler's shadow under the desk.