Harvey Birdman, Attorney at Law (2000)

S2E6 Back to the Present

The Jetsons seek out Harvey's assistance to take legal action against us for ruining the environment. It becomes clear why their city is built on stilts: the ice caps have melted, leaving the Earth submerged. Meanwhile, Phil is caught in a whirlwind of fear and excitement, convinced that the Jetsons have come to abduct him for some bizarre experiment.