Everything in the Arrowverse Leading up to 'Crisis on Infinite Earths' (PHOTOS)

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Elseworlds, Part 2
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The Monitor tests different Earths

“Elseworlds, Part 2” (Arrow Season 7, Episode 9)

As Barry Allen of Earth-90 informs everyone, the Monitor is testing Earths for the Crisis he believes is coming. “Someone is coming. Someone far, far more powerful than myself,” The Monitor then tells Oliver, Barry, and Kara. “I am testing universes to find one I hope strong enough to stand against him.”

Elsewords Oliver Monitor
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Oliver makes a deal with The Monitor

“Elseworlds, Part 3” (Supergirl Season 4, Episode 9)

He convinces him to save Barry and Kara and give them their best chance to stop the Crisis.

Elseworlds ending
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“Elseworlds” sets up “Crisis on Infinite Earths”

“Elseworlds, Part 3” (Supergirl Season 4, Episode 9)

In the final scene of the 2018 crossover, Ruby informs Oliver that Dr. Deegan made a friend in Arkham Asylum. “Don’t worry, Doctor. Everything is as it should be,” a masked man, Psycho Pirate, says from the neighboring cell. “The stage is set. Worlds will live, worlds will die, and the universe will never be the same.”

Arrow Monitor Oliver deal
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The Monitor recruits Oliver

“You Have Failed This City” (Arrow Season 7, Episode 22)

In the Season 7 finale, the Monitor arrives to take Oliver away from his quiet life with Felicity and Mia. It’s then that the terms of the deal he made are revealed. He will do “whatever the multiverse requires to survive the crisis that is looming,” which means assisting the Monitor as they “seek to prevent the inevitable.”

Arrow Oliver death
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The Monitor informs Oliver he will die

“You Have Failed This City” (Arrow Season 7, Episode 22)

The Monitor reveals he saw Oliver’s future, “inexorable and unavoidable,” and watched him die during the Crisis. However, “he can prevent the deaths of countless more, including you and your daughter,” he tells Felicity.

The Flash newspaper
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The date The Flash vanishes changes

“Legacy” (The Flash Season 5, Episode 22)

For years, the future newspaper listed the date for the “Flash Missing, Vanishes in Crisis” headline as April 24, 2024. But in the Season 5 finale, that date changed to 2019.

Supergirl Malefic
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The Monitor brings Malefic to Earth

“The Quest for Peace” (Supergirl Season 4, Episode 22)

“You’ve been trapped for too long,” the Monitor tells J’onn’s brother. “Now it is your time to avenge yourself against the brother who wronged you.”

Supergirl Monitor Lex
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The Monitor collects Lex’s body

“The Quest for Peace” (Supergirl Season 4, Episode 22)

After Lena kills her brother, The Monitor goes to him for some not-yet-known reason.

LoT Monitor
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The Monitor watches the Legends

“Hey, World!” (Legends of Tomorrow Season 4, Episode 16)

As Sara and Nate try to convince the audience not to fear the monsters, the Monitor watches and shakes his head.

Into The Void
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The Monitor informs Barry of his “Crisis” fate

“Into the Void” (The Flash Season 6, Episode 1)

The Monitor tells Barry that on December 10, 2019, “he will answer the call and make the ultimate sacrifice.” And there’s nothing he can do to change his fate. “In order for billions to survive this coming Crisis, The Flash must die,” the Monitor says.

Flash multiverse map
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Jay Garrick has been detecting antimatter across the multiverse

“A Flash of the Lightning” (The Flash Season 6, Episode 2)

He’s been keeping a record of the signatures, and if his algorithm is correct, all Earths could be in danger, he warns Barry.

Flash Crisis future
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Barry sees the team’s fates in billions of possible futures

“A Flash of the Lightning” (The Flash Season 6, Episode 2)

Barry is unable to time travel to confirm the Monitor’s warning due to a wall of antimatter, but Jay and his wife, Dr. Joan Williams, help him send his mind to the future. Barry sees a wave of antimatter sweep over and wipe out the city, including Ralph, Killer Frost, Cisco, and Iris. He also sees himself running until he disintegrates.

“The only timeline where you all survived was if I died,” he tells Iris.

Arrow dwarf star particles
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Oliver retrieves dwarf star particles from Earth 2

“Starling City” (Arrow Season 8, Episode 1)

The Monitor drops him on Lian Yu, and Oliver assumes his (dead) Earth-2 counterpart’s identity to complete the mission required of him. He must retrieve dwarf star particles, which can only be found on that Earth, and to do so, he must stop the Dark Archer (Tommy, not Malcolm, in this case).

Arrow E2 destroyed
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Earth 2 is destroyed

“Starling City” (Arrow Season 8, Episode 1)

At the end of the Season 8 premiere, Laurel informs Oliver and Diggle that Starling City is under attack — by antimatter. The three of them are the only ones to make it off that Earth as everyone else is wiped from existence.

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A "Crisis" is coming — and the entire Arrowverse is preparing for it.

The five Arrowverse shows are uniting for the upcoming "Crisis on Infinite Earths," with appearances from characters from Black LightningSmallville, and other DC properties. And ArrowThe FlashDC's Legends of TomorrowSupergirl, and Batwoman have been building to it since last season.

All the Characters Confirmed for Arrowverse Crossover 'Crisis on Infinite Earths' (PHOTOS)See Also

All the Characters Confirmed for Arrowverse Crossover 'Crisis on Infinite Earths' (PHOTOS)

Find out all the characters we'll see in the upcoming five-part event, 'Crisis on Infinite Earths.'

Click through the gallery above to see everything that's happened that's leading up to the five-part event.

Arrowverse "Crisis on Infinite Earths" Crossover, December 2019 and January 2020, The CW