

Yellow Planet/References
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Cultural references[edit]
- The episode title is a reference to the British nature documentary The Blue Planet. It mirrors the dynamics of the real-world series, featuring narration by Hugh Bonneville in the distinctive style of David Attenborough, who voiced the original documentary.
- The episode was released on April the 22nd to mark Earth Day.
- In the episode select screen, the various icons are:
- A similar episode aired in Futurama, "Naturama", where characters are depicted as animal equivalents.
- The narrator refers to the beluga whale as a "Darwinian whoopsie."
- The song sung by the beluga whales and the narwhals, "Summer Days", is a parody of "Summer Nights" from the musical Grease.
- The Monday Night Football theme song "Heavy Action" by Johnny Pearson is heard during the Galapagos land iguanas sequence, specifically when Bart gets rid of the other iguanas.
- The Moe fish says that he's twenty thousand leagues over Homer beluga whale's league, a reference to Twenty Thousand Leagues Under the Seas.
- Homer beluga mentions the fact that beluga whales sleep with one eye open.
- Homer struggles to resist the pressure of the water as he dives with Marge, showing the fact that narwhals are among the deepest-diving cetaceans, being able to dive to depths of up to 2,370 m.
- Morgan Freeman mentions the people that made the movie Happy Feet (and indirectly his companion documentary film March of the Penguins).
- The woodpecker finches migrate to an Amazon Fulfillment Center, where they eat Cheetos.
- The episode is the last to have Pamela Hayden in the cast, as for her retirement; however, the last episode she recorded was "O C'mon All Ye Faithful".
- Contrary to previous shorts or specials releasing at the same time everywhere in the world, this episode was released at midnight local time.
- A character who has the same model as Diego from "A Star Is Born Again" is the cameraman filming lions.