- According to Eureka Seven, to end existence, all you have to do is make too many things think at once... thus reaching the limit of questions and causing the universe to overload. Dewey, the Big Bad almost succeeds, by waking up the dormant aliens that have covered the earth's crust.
- Though this seems to happen only in the anime, where the thoughts have mass (the trapar is made of the dreams of the dormant Coralian crust). In the manga, the limit of questions is never mentioned. The motivations of the Coralians are very different, too.
- Actor Allusion: Kari Wahlgren playing a pink-haired Cute and Psycho Ax-Crazy girl. Sound familiar?
- Anime First
- Author Existence Failure: Poor, poor Bob Papenbrook, Ken-Goh's voice actor. He died during the English dub's production due to chronic lung complications, and was replaced by Kyle Hebert for the remainder of the series.
- Fan Nickname: Renton and Eureka are respectively nicknamed "RenTears" and "EuWrecka" whenever they get overly emotional.
- Hey, It's That Place!: Fallingwater is the setting for part of an episode.
- Memetic Mutation:
- One scene where Renton's face had gone apeshit insane when grabbed by Holland by the collar had evolved into a video called Nijiura 7.
- Keanu Reeves.
- The Other Darrin: In the English dub, Ken-Goh's voice actor Bob Papenbrook died before recording all his lines and was replaced by Kyle Hebert.
- Relationship Voice Actor:
- Yet again, Johnny Yong Bosch and Stephanie Sheh are lovers.
- It might have been the first time that Crispin Freeman's character was really pissed off by Bosch's character, but it definitely wouldn't be the last.
- Stephanie Sheh (Eureka's English VA) and Kate Higgins (Talho's English VA) would also later team up again as Sailor Moon and Sailor Mercury.
- For Gundam 00 fans, Moondoggie is Setsuna F. Seiei, Stoner is Alejandro Corner, and they both serve aboard the Gekko under the command of Ali al-Saachez.
- The Wiki Rule: Eureka Seven Wiki.