Earth-2

Earth Two is a universe parallel to Earth One. The name was coined by Martin Stein. To its own citizens, it is called Earth One.

Shortly after Hunter Zolomon gained super speed, and connected with the Speed Force, before he even became Zoom, he took control of Central City on his Earth, and everyone answered to him. After taking the Velocity drug and becoming Zoom, it became way easier for him to subjugate everyone and eventually took over the entire Earth.

History
A conflict called the War of the Americas happened sometime during the 20th Century. James Zolomon fought in it.

Sometime on a voyage, Oliver Queen and Robert Queen were involved in a violent shipwreck which took the life of the former. Robert eventually made his way back home and became the vigilante known as "The Hood" and later "The Arrow".

In 2013, the particle accelerator from S.T.A.R Labs had released dark matter waves underground, giving many civilians including Hunter Zolomon special powers. This prompted S.T.A.R. Labs of its studies in meta-humans. Various meta-humans such as Atom-Smasher, Sand Demon and Doctor Light became corrupt with their powers and became criminals. with Reverb becoming a prominent crime boss. Sometime after Hunter Zolomon, later known as Jay Garrick, became the Flash, a future Hunter showed up, known as Zoom, the two becoming enemies while acting as separate entities to give the public hope that Zoom could then destroy, with Reverb acting as Zoom's main agent.

On May 19, 2015, a singularity breached the world, originating from Earth One. As a result, Jay Garrick was sucked through. Zoom discovered how to cross the dimensions, and brought meta-humans between the worlds to assist him in his mission to kill the Flash.

For the next few months, the Flash team were forced to face various dimensionally-displaced meta-humans as well as their own "local" threats, with Zoom even mounting a direct attack that saw him break Barry's back before he had to retreat when he was injected with a speed-supressing serum. When the Earth-Two Harrison Wells travelled to Earth-One to hunt the meta-humans, Zoom attempted to blackmail Harry to help him take Barry's speed by threatening Harry's daughter Jesse, but when Barry learned the truth, he decided to help Harry rescue Jesse. After sealing the other breaches, Barry, Harry and Cisco travelled to Earth-Two to try and rescue Jesse and confront Zoom, which also led to a confrontation with Killer Frost, Reverb and Deathstorm that saw Reverb and Deathstorm being killed by Zoom after they killed Joe West. Barry and his allies were eventually able to escape Zoom's prison and rescue Jesse with the aid of Killer Frost, but Jay Garrick was apparently killed by Zoom before they could seal the final breach.

Having deduced the truth about Jay/Hunter, Barry was able to use a tachyon generator based on Eobard Thawne's notes to increase his speed to allow him to match Zoom, but Zoom abducted Wally West and blackmailed Barry to surrender his speed to save his life. Taking Caitlin Snow back to Earth-Two due to his twisted interest in her, Zoom quickly decided that he would use the now-undefended state of Earth-One to conquer it like he had his own world, prompting Barry to agree to a dangerous attempt to recreate the particle accelerator explosion and restore his speed.

Zoom brought over his entire army of meta-humans from Earth Two to conquer Earth One, causing an event known as the Metapocalypse. When Team Flash defeated all of Zoom's metas and forced him back to Earth Two, Vibe had a vision of Earth Two's destruction.

It is later revealed that Zoom stole a magnetar from Mercury Labs and modified it to create a pulse that would destroy every world in the multiverse, excluding Earth One, and after Zoom murdered Barry's father, challenged him to a race to see who's the fastest in which their combined energy would power the magnetar.

Team Flash ultimately imprison Barry to stop him from racing Zoom and attempt to stop Zoom themselves. Though they managed to banish Zoom back to Earth Two, Joe West of Earth One is accidentally sent through the breach and subsequently held hostage to force Barry to agree to the race regardless.

Earth Two, along with the rest of the multiverse, is saved when Barry creates a time remnant, whom sacrifices himself to thwart Zoom's plan, before Time Wraiths capture Zoom and carry him into the Speed Force for his crimes. Harry and Jesse subsequently return to their Earth, along with the real Jay Garrick, to help the latter return to Earth Three.

Locations

 * Atlantis
 * Big Belly Burger
 * Central City
 * Central City Orphanage
 * Gorilla refuge
 * Jitterbugs
 * S.T.A.R. Labs
 * Starling City
 * Zoom's lair

Known individuals
{{Scroll|

Residents

 * Barry Allen
 * Barry Allen's father
 * Barry Allen's mother
 * Bruce
 * Charlie (deceased)
 * Diana
 * Eddie
 * Hal
 * Henry Hewitt
 * Senator Knowles
 * Floyd Lawton
 * Oliver Queen (deceased)
 * Robert Queen/The Arrow
 * Jesse Quick
 * Singh
 * Patty Spivot
 * Snart
 * Dr. Harrison Wells
 * Iris West
 * Iris West's grandfather
 * Joe West (deceased)
 * Ashley Zolomon (deceased)
 * James Zolomon

}}

Meta-humans

 * Deathstorm (inactive)
 * Ronnie Raymond (deceased)
 * Martin Stein (deceased)
 * Adam Fells/Geomancer (deceased)
 * Shay Lamden/King Shark (currently on Earth One)
 * Laurel Lance/Black Siren (currently on Earth One)
 * Linda Park/Dr. Light (currently in hiding on Earth One)
 * Cisco Ramon/Reverb (deceased)
 * Dante Ramon/Rupture (deceased; killed on Earth One)
 * Al Rothstein/Atom-Smasher (deceased; killed on Earth One)
 * Eddie Slick/Sand Demon (deceased; killed on Earth One)
 * Caitlin Snow/Killer Frost (deceased)
 * Hunter Zolomon/The Flash/Zoom (Taken into the speed force forever)

Visitors

 * Jay Garrick/The Flash (visitor from Earth Three) (captive)
 * Barry Allen
 * Grodd (unwilling)
 * Cisco Ramon
 * Caitlin Snow (former captive)
 * Wally West (former captive)
 * Joe West (former captive)

Trivia

 * The planet's name was spelled Earth-2 in synopses of The Flash episodes, as well as in the names of episodes and.
 * Although comparable events on Earth One and Earth Two seem to happen roughly at the same time, there might be a global shift of the timelines with respect to each, as evidenced by the fact that Harrison Wells founded S.T.A.R. Labs in 1991 on Earth Two while his counterpart from Earth One (as well as Eobard Thawne in the altered timeline) founded S.T.A.R. Labs at the earliest in the year 2000. This apparent mismatch of events on the two Earths might be explained by the nature of the singularity and the breaches, connecting Earth One and Earth Two, possibly representing a gateway through both space and time. However, if the timeline of Earth Two was really somewhat ahead of schedule with reference to Earth One, it could explain why Harrison Wells of Earth Two could start the particle accelerator already in 2013 (possibly without the help of Tess Morgan), while his counterpart from Earth One accomplished that goal as late as 2020.
 * This version Earth Two seems to be an amalgam of Earths Two and Three from DC mythology. It features villainous versions of many heroes or civilians from Earth One (such as Linda Park and Laurel Lance), similar to Earth Three, but features the same heroes from Earth One, but with different civilian identities than those of Earth One (Hunter, masquerading as Jay Garrick, instead of Barry; Robert instead of Oliver) such as on Earth Two.
 * Stylistically Earth Two's Central City has a late 40s-50s aesthetic mixed with futuristic, presumably as a reference to the real world 1940s and 1950s (also known as the Golden Age of Comics). During this time The Flash character was first created, with Jay Garrick as his first civilian identity.
 * Television and computer screens on Earth Two are vertically rectangular rather than horizontally.
 * Blood types are either named differently on Earth Two or entirely different from Earth One. Harry remarks that Jesse has "PZ Negative" blood. His exact Blood type is unknown but is apparently a match.
 * Although most differences between the residents of Earth One and Earth Two are seemingly based around nothing more than them making different choices, a more subtle difference has been revealed, as Caitlin Snow of Earth One has explicitly confirmed that she does not have the meta-human gene while Killer Frost became a meta-human in the particle accelerator explosion of Earth Two; other differences could be based on circumstances.
 * Harry claims that serial killers are "an anomaly" on Earth Two. Hunter Zolomon's conviction was met with massive media coverage.
 * This Earth appears to have a much more advanced education system as Jesse has five majors which is common there, but not on Earth One.
 * Earth Two and its inhabitants all vibrate at a higher frequency.
 * Earth Two and Earth One doppelgängers are said to be mirror images of one another and are opposite hand dominants.

The Flash
{{Scroll|

Season 3
}}