- "This Earth is at the center of the multiverse. It's the access point to every other Earth in existence."
- —Hunter Zolomon, referring to Earth One[src]
Earth One is a universe parallel to a plethora of others, such as Earth Two. The name was coined by Martin Stein. To Earth Two citizens Earth One is referred to as Earth Two. Also, to Earth Seventeen's citizens, it is known as Terra Prime.
After learning of the existence of parallel worlds, Martin Stein coined the world's name, "Earth One", to describe Team Flash's relative position in regards to all of the other worlds. Beginning in the early 21st century it has become home to numerous groups of extraordinary protectors, such as the vigilante unit Team Arrow, the scarlet speedster known as the Flash and his team of allies who emerged after the explosion of the S.T.A.R. Labs particle accelerator gave rise to superpowered metahumans, and John Constantine's group of mystical allies. Even in other times, similar such heroes operate, such as the secret mid-20th century alliance the Justice Society of America, and the time-travelling Legends.
From Earth Two
- Laurel Lance/Black Siren (incarcerated)
- Shay Lamden/King Shark (incarcerated)
- Linda Park/Dr. Light
- Hunter Zolomon/The Flash/Zoom/Black Flash (deceased)
- Dante Ramon/Rupture (deceased)
- Al Rothstein/Atom-Smasher (deceased)
- Eddie Slick/Sand Demon (deceased)
- Harrison Wells
- Jesse Quick
- Zoom's meta-human group
From Earth Three
From Earth Nineteen
- Harrison "H.R." Wells (became permanent resident, deceased)
From Earth Thirty-Eight
From an unknown Earth
- "Mr. Queen Is Unavailable"
- "Roy to the Rescue"
- "Down the Rabbit Hole"
- "The Sample"
- "Closing In"
- "Heroic Deeds"
DC's Legends of Tomorrow
- "Worlds Finest" (mentioned)
- "Star-Crossed" (mentioned)
Chronicles of Cisco
Arrow: Season 2.5
The Flash: Season Zero
Arrow: The Dark Archer
Behind the scenes
- The universe's name is spelled Earth-1 in the synopses for The Flash episodes.
- Earth One vibrates at a lower frequency than Earth Two.
|Earth One • Earth Two • Earth Three • Earth Sixteen • Earth Seventeen • Earth Nineteen • Earth Thirty-Seven • Earth Thirty-Eight|