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"I think you're remembering that from another time. Another Earth, perhaps."
Lex Luthor[src]

Earth-38[1] was one of the many universes in the multiverse. It was the home universe of Superman and Supergirl. During the Anti-Monitor Crisis, the entire universe was engulfed in a wave of antimatter, with 3 billion of Earth's citizens surviving due to evacuation to Earth-1, making them refugees. Unfortunately, the antimatter wave would later reach Earth-1 as well, killing all surviving inhabitants except Supergirl, J'onn J'onzz, and Lex Luthor.

After Oliver Queen died while battling the Anti-Monitor and reformed the universe, Earth-Prime was formed, which contained most elements of Earth-1, Earth-38, and Earth-TUD5. As such, while this Earth may be physically gone, its people live on as part of Earth-Prime.


"You know J'onn J'onzz from Supergirl's Earth?"
"Of course I know J'onn! Wait, go back...Supergirl has her
own Earth?"
"Not anymore.
Sara Lance, Ray Palmer, and J'onn J'onzz[src]

Alien life was common knowledge for over a decade on the Earth of this universe - in particular, the Kryptonian heroes Superman and Supergirl. Barry Allen accidentally traveled to the Earth of this universe while testing out his tachyon device and was able to return home with Supergirl's aid.[2]

A few months later, Barry and Cisco traveled to the Earth of this universe to recruit Supergirl's help[3] in facing the Dominators.[1]

When Cisco and Gypsy had a duel over the life of H.R. Wells, they crossed the dimensions and landed on this universe's Earth, in the office of James Olsen. They were seen by Eve Teschmacher fighting before vanishing into another breach.[4]

Recently, the atmosphere of Earth-38 had been seeded with a trace amount of lead, making the planet uninhabitable to Daxamites.[5] Though by the 2400's of a now erased future, a cure was invented by L-Corp, allowing said species to stay on Earth without any problems.[6]

Earth-38 being destroyed by antimatter

In 2019, a wave of antimatter sent by the Anti-Monitor destroyed this Earth; however, with the help of Lena Luthor and heroes of Earth-1, the heroes of Earth-38 manage to evacuate 3 billion inhabitants to Earth-1. The Monitor predicted that one third of all survivors were saved by Oliver Queen, sacrificing himself to protect the quantum tower protecting Earth-38 from destruction before the tower, the Earth and Queen himself fell,[7] however, with the help of Paragons and the Spectre, the Earths-38, 1 and TUD5 were merged into Earth-Prime.[8]

The Superfriends retain their knowledge of Earth-38 and use its history as a reference point in many of their adventures,[9] sometimes noting the changes between the past and the present.[10][11]

Events (in chronological order)



Erased future

Notable individuals

Former residents


From Earth-1

From Earth-19

From Earth-221

From Earth-TUD7

From the Fifth Dimension

From the Netherverse

From an unknown Earth

Known locations

  • Arcturus (star; destroyed by antimatter)
  • Argo City (city; formerly part of Krypton (Earth-38); destroyed by antimatter)
  • AZ336XB12 (star; destroyed by antimatter)
  • Sol (star; destroyed by antimatter)
    • Earth (planet; destroyed by antimatter)
      • Moon (moon; destroyed by antimatter)
    • Mars (planet; destroyed by antimatter)
    • Mercury (planet; destroyed by antimatter)
    • Jupiter (planet; destroyed by antimatter)
    • Saturn (planet; destroyed by antimatter)
      • Titan (moon; destroyed by antimatter)
    • Uranus (planet; destroyed by antimatter)
    • Venus (planet; destroyed by antimatter)
  • Rao (star; destroyed by antimatter)
    • Daxam (planet; destroyed by antimatter)
    • Jarhanpur (planet; destroyed)
    • Krypton (planet; destroyed in 1979)
  • Almerac (planet; destroyed by antimatter)
  • Barvex (planet; destroyed by antimatter)
  • Colu (planet; destroyed by antimatter)
  • Durla (planet; destroyed by antimatter)
  • Hellgram (planet; destroyed by antimatter)
  • Ikthanol (planet; destroyed by antimatter)
  • Khundia (planet; destroyed by antimatter)
  • Maaldoria (planet; destroyed by antimatter)
  • Naltor (planet; destroyed by antimatter)
  • Phoria (planet; destroyed by antimatter)
  • Sedenach (planet; destroyed by antimatter)
  • Starhaven (planet; destroyed by antimatter)
  • Thanagar (planet; destroyed by antimatter)
  • Trombus (planet; destroyed by antimatter)
  • Valeron (planet; destroyed by antimatter)
  • Warworld (planet; destroyed by antimatter)
  • Winath (planet; destroyed by antimatter)



Season 1

Season 2

Season 3

Season 4

Season 5

Season 6

The Flash

Season 2

Season 3

Season 4

Season 5

Season 6

Seaason 7

DC's Legends of Tomorrow

Season 2

Season 3

Season 5


Season 6


Season 1


Adventures of Supergirl

Crisis on Infinite Earths Giant

  • "Infinite Luthor, Part 1(mentioned)


The Chronicles of Cisco


  • Earth-38's designation number was not revealed until "Invasion!", which aired around a year after Supergirl premiered.
  • Time on Earth-38 flows faster than Earth-1 by several hours; a few moments Barry was gone on Earth-1, he had an adventure on this world.
  • Barry Allen went through a series of names from individuals on his Earth and Earth-2, seeing if they existed on Earth-38. After running them by Kara Danvers and looking them up online, it appeared that Harrison Wells, Cisco Ramon, Caitlin Snow, Green Arrow, Black Canary, the Atom, Firestorm, Zoom and even himself, as the Flash, all either did not exist or at the very least didn't share the same names and identities of their counterparts.
  • While Central City still existed on Earth-38, S.T.A.R. Labs did not.
  • The existence of extraterrestrial life was common knowledge on the Earth of Earth-38, whereas only a small number of individuals outside of the government knew of them on Earth-1, at least in the 21st century.
  • It was identical to Earth-1 in many ways such as aesthetics, time, the existence of real-life figures such as celebrities, politicians and artists, currency, law enforcement, crime, vigilantism, government, mass media, fine art, history, historical events, holidays, politics, political issues, the internet, magic, life, everyday life, physical laws, nature, Greek Mythology, science, popular culture and technology unlike many other Earths.
  • There had been numerous encounters with genies, including some who may have been Imps, that have been documented for centuries on Earth-38.
  • The F.B.I. (Federal Bureau of Investigation), The United States Army, and the FAA all existed on Earth-38 as well.
  • The Chemical compound "DT Dichlorodiphenyltrichloroethane" (also known as DDT) existed on Earth-38 before it was banned by the American government who destroyed any remaining stockpiles of it.
  • At the time of its destruction during the Crisis, its Earth was populated by 7.53 billion assorted individuals that included humans, meta-humans, and various alien species.
  • Earth-38 was a key universe where the Monitor placed a quantum tower.

Behind the scenes

  • The number 38 is a reference to 1938, the year Superman debuted.
  • Earth-38 has been referred to as "Earth-CBS" by Marc Guggenheim as the series first aired on CBS before moving to The CW.
  • In the comics, Earth-38 is Home to a Superman that debuted in 1938 and a Batman that first appeared in 1939. Unlike many of the worlds of the Multiverse, time passes on Earth-38 as it does on Earth Prime. Its Worlds Finest team and other heroes aged over the course of passing decades and eventually ceded their roles to their successors and children, beginning a heroic legacy that would continue well into the 30th century itself.
  • Next to Earth-1, Earth-38 was the second most important universe in the original multiverse as it was the main setting of one of the TV shows of the Arrowverse, Supergirl.
  • Real-life similarities (all of which has been mentioned or seen) that have been confirmed to have existed in Earth-38 include: