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A list of crossover episodes which involve characters or plotlines from multiple shows in the shared multiverse. They are arranged chronologically, grouped by season.

2014-2015 Season

Episode from # Episode name Show(s) crossing over

01. "Pilot" Arrow S3

The Flash S1
Barry Allen calls Oliver Queen, saying he needs some advice.
01. "The Calm" The Flash S1
Arrow S3
Oliver Queen takes Barry Allen up on his offer. Barry then visits Starling City to reveal his newfound powers and ask what he should do.

04. "Going Rogue" Arrow S3

Felicity Smoak visits Barry Allen in Central City to see his superpowers for herself, meets and helps Team Flash, and assists them in defeating
Leonard Snart, aka Captain Cold.

07. "Power Outage" Arrow S3

The Flash S1 William Tockman, the Clock King, escapes custody in the CCPD and takes several people hostage, including Iris and Joe West.
08. "Flash vs. Arrow" Arrow S3

Oliver Queen, Felicity Smoak and John Diggle head to Central City looking for the boomerang killer, and help Team Flash fight Roy Bivolo, a meta-
human who can cause uncontrollable rage in others. Oliver and Barry's differing methods cause tension between the two, and they are forced to
fight when Bivolo uses his powers on Barry.
08. "The Brave and the Bold" The Flash S1
Arrow S3 Barry Allen, Cisco Ramon and Caitlin Snow visit Starling City to help Team Arrow defeat assassin Digger Harkness. While there, Cisco meets
Detective Quentin Lance, and Barry and Oliver resolve their previous differences.
01.-06. "Episode 1" "Episode 3" "Episode 4" "Episode 6" Arrow S3 The Flash S1
Cisco Ramon uses Felicity Smoak's facial recognition software to look for meta-humans outside Central City and finds evidence of Mari McCabe
using her animal powers against thugs in Detroit. He nicknames her "Vixen" and gives her whereabouts to Barry Allen, who decides to take
backup; he and the Arrow show up at Mari's apartment. When Barry uses her name, she panics and runs away. Flash and the Arrow chase Mari,

Vixen S1 who uses various animal powers to evade them, including speed, wall-climbing, camouflage, and flight. They eventually talk; Mari explains she was
not in Central City for the particle accelerator explosion, a fact confirmed by Felicity Smoak, and refuses their offer of help, threatening them with
violence if they return. Flash and the Arrow visit Mari again, offering to help train her if she intends to become a vigilante; she says she is but wants
to work things out on her own. She asks about getting a codename and Barry says they call her "Vixen"; he lets slip Cisco's name, giving her a
Cyber Augmentation and the
clue as to his identity. (Takes place around the same time as "The Offer".) Science Behind Mass Effect:
Andromeda
18. "All Star Team Up" Arrow S3
The Flash S1 Ray Palmer and Felicity Smoak visitMass
S.T.A.R.
Effect LabsAndromeda
to get help perfecting Ray's A.T.O.M. Exosuit, and help Team Flash defeat a swarm of robotic
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bees.
19. "Broken Arrow" Games Movies TV Wikis START A WIKI
The Flash S1
Team Arrow and Ray Palmer defeat the meta-human Jake Simmons, aka "Deathbolt", who has come to Starling City thinking no-one can stop him
Arrow S3
with the Arrow gone. Simmons is imprisoned in the Pipeline, but Cisco and Ray realize he was in Opal City during the dark matter wave, making
the source of his abilities a mystery.

19. "Who is Harrison Wells?" Arrow S3

Cisco Ramon and Joe West head to Starling City to investigate the real identity of Harrison Wells with the help of Quentin Lance. Cisco also meets
Laurel Lance and upgrades her sonic device, renaming it the "Canary Cry".
The Flash S1 22. "Rogue Air" Arrow S3
Barry Allen decides to move the meta-humans from the Pipeline at S.T.A.R. Labs to the A.R.G.U.S. prison on Lian Yu, to protect them from the
plans of the Reverse Flash. He enlists the help of Leonard Snart, but Snart double-crosses the Flash and frees most of the villains. Barry then
fights the Reverse Flash, defeating him with the help of Oliver Queen and Firestorm.
23. "My Name Is Oliver Queen" The Flash S1
Arrow S3
Barry Allen briefly visits Nanda Parbat to save the members of Team Arrow, convincing them Oliver still needs their help.

2015-2016 Season

Episode from # Episode name Show(s) crossing over

01. "Green Arrow" The Flash S2

In a flash-forward to six months in the future, Barry Allen visits Oliver Queen in a graveyard, apologising for missing a funeral. Oliver vows to kill
"him", and asks Barry to leave before weeping over the grave.
Arrow S4 05. "Haunted" Constantine (set after its S1)

In a flashback to his time infiltrating Baron Reiter's operation on Lian Yu, Oliver Queen meets John Constantine, saving his life while he is
retrieving the Orb of Horus. In the present, Oliver calls in this favour from John to restore the soul of Sara Lance, who has been resurrected from
the dead by the Lazarus Pit.

01.-06. "Episode 1" "Episode 4" "Episode 5" "Episode 6" Arrow S4 The Flash S2
After Mari confronted Dr. Macalester about his role in Kuasa's plot to steal her totem, Cisco contacts her to assist the Flash and Firestorm to stop
Mark Mardon from causing havoc at Monument Point. After being placed in a coma by Mardon, Mari awakens with Chuck at her side. Soon she
discovers that another totem from Zambesi Village was stolen. Mari discovers that Benatu Eshu is responsible for the heist and he uses the totem's
Vixen S2 pyrokinetic abilities against her. Mari seeks out Kuasa and discovers that Eshu was responsible for the massacre of most of the Zambesi in search
of the magic totems. With the help of Felicity, the sisters reluctantly work together and they find the Zambesei water totem. After Kuasa's attempt at
betrayal is thwarted by Mari, the Atom and Black Canary, they together battle Eshu. Mari defeats (and possibly unintentionally drowns) Eshu, at the
cost of Kuasa's life. After the fire totem is destroyed, Vixen meets up with Flash, Green Arrow, Black Canary, and Atom at Coast City, feeling that in
Detroit or out, it is her responsibility to protect others

08. "Legends of Today" Arrow S4

When Vandal Savage comes to Central City looking for Kendra Saunders, Team Flash ask Team Arrow to help keep her safe, but Carter Hall
The Flash S2
shows up claiming he and Kendra are reincarnated lovers. Savage follows them, and they learn from Malcolm Merlyn that Savage is an immortal
looking for the Staff of Horus, and will stop at nothing until he finds it and kills both Carter and Kendra.
08. "Legends of Yesterday" The Flash S2

Team Arrow and Team Flash work together to save Kendra Saunders and Carter Hall from Vandal Savage, who is willing to destroy both Central
Arrow S4
and Star Cities in his quest to kill them. They enlist the help of Malcolm Merlyn, who secretly recovers Savage's remains after he is turned to ash in
the final conflict.
01. "Pilot, Part 1" Arrow S4

Approached by Rip Hunter to be part of his time-travelling team, Ray Palmer seeks Oliver Queen's advice, and decides to join. Sara Lance, given
the same offer, spars with her sister Laurel, who encourages her to go and be a hero. She gives Sara a new codename, "White Canary", and a
new suit to go with it that doesn't include a mask. Martin Stein, Jefferson Jackson, Kendra Saunders, Carter Hall, Leonard Snart and Mick Rory are
DC's Legends of
also recruited, all in order to stop Vandal Savage from conquering the world in the year 2166. They travel back in time to 1975 to meet Dr. Aldus
Tomorrow S1
Boardman, an expert on Savage, whose information would later help Team Arrow and Team Flash defeat Savage in 2015.

02. "Pilot, Part 2" Arrow S4

At their first encounter with Vandal Savage in 1975 Norway, Rip Hunter's team find him selling a nuclear warhead at an illegal arms auction; one of
the bidders is Damien Darhk, looking the same as he does in 2015, backed up by H.I.V.E. "ghosts".

15. "Taken" Vixen (set after its S2)

Arrow S4
Mari McCabe visits Star City, using her totem to help Team Arrow find and destroy the source of Damien Darhk's power.
15. "King Shark" Arrow S4
The Flash S2
John and Lyla Diggle visit Star City and help Barry defeat King Shark.

DC's Legends of 6. "Star City 2046" Arrow S4

Tomorrow S1 When the team arrives in 2046, they meet Connor Hawke and an old Oliver Queen. And they team up to take down down Grant Wilson.

18. "Worlds Finest" The Flash S2

Cyber Augmentation and the
Supergirl S1 While testing the Tachyon prototype to increase his speed, Barry Allen accidentally travels to Earth Thirty-Eight's National
Science BehindCity
MassandEffect:
meets Kara
Andromeda
Danvers, helping her to defeat the Silver Banshee and Livewire before she helps him return home split seconds after he left.

17. "Beacon of Hope" The Flash S2

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Arrow S4
Brie Larvan escapes from jail and heads to Star City, looking to steal the Palmer Technologies bio-chip embedded in Felicity's spine.
Games Movies TV Wikis START A WIKI

DC's Legends of 9. "Left Behind" Arrow S4

Tomorrow S1 When Ray, Kendra and Sara are stuck in 1958, Sara joins the League of Assassins and meets Ra's al Ghul.

19. "Canary Cry" The Flash S2

Arrow S4 Barry visits Oliver at Laurel's grave, apologizing for missing her funeral due to Zoom. Oliver vows to kill Damien Darhk in revenge and asks Barry
to leave before weeping over Laurel's grave. (This is the flash forward scene from "Green Arrow".)

16. "Legendary" Arrow S4 The Flash S2

DC's Legends of Rip brings the team back to Central City in 2016 - but five months after they left. Sara returns to Star City, where her father tells her of Laurel's
Tomorrow S1 death. Rip tells Sara they can't go back in time to save her. Sara and Quentin visit Laurel's Grave where Sara reveals it was Laurel that convinced
her to join Rip's team, and she will continue for her sister. Meanwhile, Professor Stein reunites briefly with his wife Clarissa

2016-2017 Season

Episode from # Episode name Show(s) crossing over

02. "Paradox" Arrow S5

The Flash S3 Barry goes to Star City to talk with Felicity about the changes that he has noticed as a result of Flashpoint. Team Arrow are unaffected, except that
John Diggle and Lyla Michaels have a son - John Junior - instead of daughter Sara.
01. "Out of Time" Arrow S5

Nate Heywood notices changes to the timeline, and seeks out Oliver Queen, whom he has worked out is the Green Arrow, to help him find the
DC's Legends of
Legends. They find Mick Rory in stasis on the Waverider under the sea. When they wake him, Mick tells them the Legends were scattered after
Tomorrow S2
attempting to stop Damien Darhk from blowing up New York with the Nazis in 1942. Oliver convinces Nate to join Mick in finding the others, while
Darhk is revealed to have teamed up with Eobard Thawne.
03. "Shogun" The Flash S3
DC's Legends of Martin Stein and Jefferson Jackson find a secret compartment on board the Waverider and discover a secret message from their old friend Barry
Tomorrow S2 Allen that he sent to Rip Hunter from 2056 that Rip was never to tell the team but they listen to it and agree to keep it secret. They listen to the
message again in "Abominations", teasing that "A War is Coming".
05. "Compromised" Arrow S5

Damien Darhk continues his secret partnership with Eobard Thawne though under some hesitation but Damien agrees and becomes a senior
DC's Legends of
adviser to President Ronald Reagan in the 1980s but he meets the younger Martin Stein who tries to confront him but he stabs him altering the
Tomorrow S2
timeline but then he faces Sara who threatens him telling him his future, which scares Damien just as Eobard helps him escape and Damien asks
Eobard for help to change his destiny, Eobard gives him a Time Sphere and they travel in time to change both their destinies.
08. "Medusa" The Flash S3
Supergirl S2 Barry Allen and Cisco Ramon travel to Earth Thirty-Eight in need of Kara's help. They came to her apartment on her earth, where Barry introduces
Kara to Cisco and asks her if she recalls a favor she owes.

08. "Invasion!" Supergirl S2 Arrow S5 DC's Legends of Tomorrow S2

Barry speeds over to Star City to ask for Oliver, Felicity and Diggle's help to go after aliens known as the Dominators according to Lyla Michaels.
Thea Queen wants to come out of retirement as Speedy and help too, Barry also decides to call on the Legends for their assistance and he and
Cisco travel to Earth 38 for Supergirl's help too seeing as she's a alien which may help, Barry introduces her to the others especially Oliver. Ray
shows Cisco his new suit then tells Barry that Snart died a hero. Felicity talks to Cisco over his anger for Barry while Martin and Jax show him the
message, along with Oliver, they all discover that it's Barry telling Rip Hunter that he created Flashpoint, Caitlin takes Martin back to his home
The Flash S3
where he finds that he has a daughter while everyone trains against Supergirl whose too strong for them all, Cisco finds the message and wants
Barry to tell everyone about Flashpoint, Barry tells the others especially that Diggle had a daughter, but now has a son. this creates a rift in the
team, with Sara reminding Barry that she always wants to save Laurel but she knows she can't due to the implications on her friends. Ray calls
Barry's Flashpoint Timeline a Time Abberation. Barry sits out of the mission with Oliver who backs him up while Kara leads the team but the
mission becomes a trap and they get brainwashed and Barry and Oliver try to stop them, Wally West helps too before Supergirl hurts him. The
Flash and Green Arrow are able to save their friends before some of them get taken away.
08. "Invasion!" Supergirl S2 The Flash S3 DC's Legends of Tomorrow S2

Oliver, Diggle, Thea, Sara and Ray got taken to the Dominators spaceship where they are all put to sleep under a hallucination of what would
happen if Oliver, his father and Sara never got on the Queen's Gambit. They eventually discover its a dream world and battle Malcolm Merlyn,
Arrow S5 Deathstroke and Damien Darhk to escape then they wake up and battle Dominators and try to get away. Meanwhile Felicity brings Cisco to Star
City where they try to find them, he meets Curtis Holt, Rory Regan and Rene Ramirez who despises Metahumans and Aliens. she asks for The
Flash and Supergirl's help when they discover Dominator technology fell into the wrong hands. They take on a villain whom they nickname
Cyberwoman before they find their friends and contact Nate aboard the Waverider to save them as they find out more on the plan.
07. "Invasion!" Supergirl S2 The Flash S3 Arrow S5
Everyone except for Thea regroups in Central City. Nate joins them and reveals that he found footage from the first Dominators Invasion in 1951
and the team suggest they capture one of the Dominators to get information on their plan seeing as they took some of them first. Cisco and Felicity
want to time travel in the Waverider, Nate takes Amaya Jiwe and Mick, Oliver tells Kara to sit out of the mission as he feels some normatlity needs
restored. Felicity gets sick from the effects of Time Travel but she and Cisco remain on the Waverider where Felicity talks to Cisco again as she
can tell that Cisco wanted to get away from Barry. Mick, Amaya and Nate go to find the Dominators. Nate tries out his new Steel Suit that Ray built
Cyber Augmentation and the
him. the three Legends get captured while trying to kidnap a Dominator, they get taken by Agent Smith who in the present days tries to go after
Science Behind Mass Effect:
Barry, Oliver, Ray and Sara, but they overpower his agents and both teams in past and present discover thatAndromeda
the Dominators live in fear of
DC's Legends of Metahumans due to the Justice Society of America in the past but in the present when Barry created Flashpoint as it broke a peace between them
Tomorrow S2 and Earth so the Dominators want Barry to surrender
Mass Effect himself so they
Andromeda live in peace and they created a Meta Bomb to kill all of the Metahumans.
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Felicity and Cisco save their friends but when they return to 2016 Central City, Cisco discovers that he changed the timeline, This prompts him to
Games resultingMovies
make up and forgive Barry for creating Flashpoint TVthe team
in Dante's death. Wikis
try to persuade Barry not START
to surrender
A WIKI himself to the

Dominators. they battle the Dominators. Sara uses the Waverider's beam to lift the Meta Bomb away so Firestorm can transmutate it. he succeeds
and all of the Dominators retreat. The Teams celebrate their victory and Cisco created and inter-dimensional extrapolator for Kara so she could
create breaches to come to their earth if they need her help or they come to her earth if ever she needed her help. Kara, Barry and Oliver have a
group hug and Diggle forgives Barry before they all said goodbyes. Caitlin Snow continued to try and help Stein get through to his daughter Lily
whom he reveals was the result of a time aberration he caused in 1987. he tells Jax about her after he connects with her but tells him not to tell the
rest of their team.
08. "The Chicago Way" Arrow S5
Eobard and Damien arrive in 1920s Chicago with their new recruit, Malcolm Merlyn to convince Al Capone to let them help him and deal with his
nemesis Elliot Ness, Merlyn influences a trap for the Legends for Damien observes them taking the bait, Damien and Eobard capture Sara and
Stein, Malcolm reveals to Sara that he's responsible for blowing up the Queen's Gambit and offers her a chance to redo her life but she tells him
that no one can change time for their own needs or desires, then Damien takes Stein to talk to Thawne who steals Stein's identity so he can
infiltrate the Waverider and steal a piece of an amulet that he collected in 1940s. Merlyn leads some of Capone's men to help expand the search,
DC's Legends of
he battles Sara while Amaya and Mick battle Thawne, who later shows Merlyn and Darhk that the amulet is a compass link to their discovery of the
Tomorrow S2
Spear of Destiny.
09. "Raiders of the Lost Art" Arrow S5

Malcolm Merlyn and Damien Darhk travel back to 1967 to find Rip Hunter who has a piece of the Spear of Destiny but when the Legends find them
and come into conflict, they cause a Time Abberation where George Lucas quit film school because the Legion scared him off but the Legends
manage to convince Lucas to continue directing just in time to battle Merlyn and Darhk but just at that point Eobard Thawne arrives and the Legion
kidnap Rip Hunter.
11. "Dead or Alive" Supergirl S2
The Flash S3 While Cicso and Gypsy battled in all of the Mutliverse, they end up in Earth-38 and enter CatCo Worldwide Media, where Eve Teschmacher
watched and disappeared in to the portal and Eve relips This is why National City got weirder and weirder every day.
10. The Legion of Doom The Flash, Arrow

The episode was told from the Legion of Doom's point of view, although it references back to both Arrow and The Flash where this story reveals
DC's Legends of that Eobard and Damien recruited Malcolm straight after the events of Schism. Also as the Legends figure out the speedster, Martin recalls his
Tomorrow S2 involvement in events of "Fast Enough" recalling when Eobard was erased. Eobard himself recalls the events of Flashpoint where he was taken
out of the timeline by the Flash right after he chose to save his mother and help Eobard captive for months. Hunter Zolomon debuted in the show
as Speed Force's inforcer.
11. "Second Chances" The Flash S3
Arrow S5 Oliver calls for some help from Captain David Singh as the Green Arrow, even needing some assistance from The Flash himself when he needed
to prove to this to Singh himself.

16. "Star-Crossed" The Flash S3

Winn found the Inter-Dimensional Extrapolator and ran diagnostics on it before giving it back to Kara while claiming he and Cisco could be friends
Supergirl S2
if they lived in the same dimension. Music Meister arrives at the D.E.O. and hypnotizes Supergirl, then snatches her extrapolator and announces
his plan to go after the "fastest man alive" before leaving for Earth One. Kara wakes up to find herself in a 1920's nightclub.

17. "Duet" Supergirl S2

Mon-El and J'onn J'onzz travel to Earth One carrying a comatose Kara to ask Team Flash for help. Music Meister hypnotizes Barry and sends him
into the same dream world as Kara, where they are instructed to reach the end of the musical in order to leave. Wally, Cisco and J'onn confront
The Flash S3
and defeat the Music Meister. Mon-El and Iris later confront him, and he tells them the only way to bring Barry and Kara back lies within
themselves. They are later able to awake them via a kiss. Music Meister then reveals his plan all along was to teach them a lesson about love,
then fades away to teach his lesson to others. Kara, Mon-El and J'onn then depart for Earth Thirty-Eight.

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