While Barry and Iris deal with the heartbreaking loss of their daughter, Nora, the team faces their greatest threat yet — one that threatens to destroy all of Central City. Meanwhile, Killer Frost has a brush with death that results in an unexpected new dynamic that will change her relationship with Caitlin forever.

Faced with the news of his impending death, Barry's resiliency suffers as he struggles to fight fate. Meanwhile, Cecile's career as a D.A. conflicts with her identity when she crosses paths with a villainous meta-human.

Knowing that Crisis is only weeks away, Barry prepares a member of Team Flash for life without him while hunting a terrifying meta-human with an unquenchable thirst. Meanwhile, Ralph uncovers a family secret.

Barry's efforts to prepare Cisco for Crisis are derailed when Cisco schemes to save Barry's life instead. Meanwhile, Ramsey Rosso uses his deadly new abilities to save his own life, while sacrificing his humanity in the process.

Cisco's faith in his ability to fill Barry's shoes as Team Leader is upended when he learns of a shocking murder. Meanwhile, Killer Frost trusts no one except herself to hunt down the dangerous Ramsey Rosso.

Barry turns his attention to prepping Elongated Man for life after Crisis and without The Flash, but Ralph ultimately teaches Barry a lesson. Meanwhile, Cecile faces her own moment of self-discovery while helping a recuperated Chester P. Runk reclaim his identity.

As Barry Allen stands on the threshold of his impending death in Crisis, his convictions are tested when the monstrous Dr. Ramsey Rosso infects The Flash with a mysterious, hallucinogenic contagion. Meanwhile, reporter Iris West-Allen uncovers a vast conspiracy.

With The Flash freshly infected by the monstrous Bloodwork, Iris and Cisco battle to help Barry take control of himself before he’s lost forever to Ramsey’s influence. Meanwhile, the rest of Team Flash fight to reclaim control of Central City from Bloodwork’s growing army.

Pariah enlists Black Lightning to help stop the Anti-Monitor after Flash-90 shares what he learned from his battle in ‘Elseworlds.’ With the help of Black Lightning, Barry, Cisco and Killer Frost come up with a plan that could save them all. Meanwhile, Iris has a heart-to-heart with Ryan Choi, while Oliver and Diggle return to an old familiar stomping ground.

The crossover starts on Supergirl S05E09 and Batwoman S01E09. It continues on Arrow S08E08 and Legends of Tomorrow S05E01.

After "The Citizen" prints an explosive story, Iris' life is threatened; refusing to hide from her attackers, Iris sets out to expose a dangerous organization; Barry must face the consequences of the Crisis and fulfill Oliver Queen's wish for him.

Barry and Iris plan a romantic dinner for Valentine's Day but their evening is interrupted by an old foe - Amunet; Frost gets into the holiday spirit and attempts to help Allegra reconnect with an old love.

After months of searching for Sue Dearbon, Ralph gets a lead on her whereabouts and finally comes face to face with his missing client. However, Sue refuses to return home to her family, and instead, takes Ralph on a daring adventure. Iris faces a new challenge while Barry considers a potentially dangerous request from a trusted source.

Feeling overwhelmed with all the changes since Crisis, Barry conducts an experiment that goes awry and puts him directly in Gorilla Grodd’s path. Expecting the worst, Barry is surprised when Grodd asks for his help. Unfortunately for both The Flash and Grodd, things get worse when another villain appears – Solovar. Meanwhile, Iris works with Eva to escape the Mirrorverse.

Kid Flash returns to Central City with a Zen attitude and new tricks up his sleeve. While thrilled to see his family again, Wally confides to Barry that he returned because he thinks there is something wrong with the speed force. Meanwhile, Cisco returns from his fact-finding mission across Earth-Prime.

The Flash takes on a dangerous new meta named Sunshine. Cisco sets out to help Nash.

After Black Hole hires Rag Doll to kill Joe, Singh suggests he go into Witness Protection but Joe refuses to stop investigating Carver. While investigating Carver with Cisco, Ralph runs into Sue. Iris becomes suspicious of Eva.

After recent events, Barry takes a closer look at his life with Iris. Eva makes a bold move.

When Godspeed returns, Barry turns to Hartley Rathaway for help. However, things get tense quickly after Barry realizes one of the changes from Crisis is that The Flash and Pied Piper are now enemies. Meanwhile, Iris tries to escape the Mirrorverse.

Barry considers a risky plan to save Iris from the Mirrorverse. Ralph attempts to stop Sue from making a grave mistake that could destroy her life.

Keď zlyhá experiment na záchranu Barryho rýchlosti, Nash Wells začne hľadať spôsob, ako by Flasha zachránil, a príde s nebezpečným plánom. Iris si vnútri zrkadlového sveta uvedomí niečo znepokojujúce a Cecile čelí Rose Dillon.

Keď Barry zrazu získa schopnosť supermyslenia, pokúsi sa svoje nové nadanie využiť na záchranu Iris. Kým je Barry nadšený zo svojej novej schopnosti, Cisco má o nej isté pochybnosti. Eva čelí zdrvujúcej pravde.

Kým je Eva čím ďalej silnejšia, Barry a jeho tím musia prísť na spôsob, ako ju zastaviť. Počas toho sú šokovaní príchodom starej kamarátky Sue Dearbonovej, ktorá kvôli nim riskuje svoj život.

Flash sa musí vysporiadať s Abra Kadabrou, ktorý sa zrazu vrátil do Central City, pretože sa chce pomstiť a vyrovnať skóre. Allegra rieši neistú situáciu a Caitlin má podozrenie, že je s Frost niečo zle. Iris je nútená čeliť temným chvíľam zo svojej minulosti.

Keď sa nový mocný zloduch Psych zameria na zosilnenie ľudského strachu, aby v Central City spôsobil chaos, Barry si s Cecileinou pomocou uvedomí, že musí čeliť svojím najväčším obavám, aby bol schopný ho premôcť. Joe je prekvapený, keď sa Kristen Kramer z miestneho úradu objaví na policajnej stanici, a preto ho Iris upozorní, nech sa viac zameria na dôvod jej návštevy. Caitlin a Frost vedú búrlivú debatu nad tým, ako má pokračovať ich život.

Cisco a Chester cestujú späť v čase, ale uviaznu v roku 1998, v ktorom prežívajú ten rovnaký deň stále dookola. Kľúčom k ich návratu je dom, v ktorom Chester žil ako dieťa, ale on ho odmieta navštíviť. Iris si medzitým vytvára puto so Zdrojom rýchlosti.

Keď záhadný zloduch s ľadovými schopnosťami zariadi, aby bola Frost obvinená z brutálnej vraždy, Frost musí prísť na to, ako očistiť svoje meno. Barry a Iris navštívi prekvapivý hosť a Joe sa musí vysporiadať s Kristen Kramerovou.

Vzhľadom k tomu, že Frost čelí nespravodlivému trestu za svoje skoršie prehrešky, Caitlin robí, čo môže, aby zachránila svoju sestru. Barryho snaha o ochranu Zdroja rýchlosti vedie k šokujúcemu odhaleniu.

Po zdrvujúcej zrade sa Barry obráti na nadčasového Wellsa a požiada ho o pomoc. Iris vedie svojich novinárov po nebezpečnej ceste za odpoveďami a Cisco povie Kamille o svojej najväčšej obave.

Iris robí, čo môže, aby odhalila pravdu týkajúcu sa Psycha. Barry začína nový, ale riskantný tréning, ktorý sa mu vypomstí. Joe a Cisco urobia rozhodnutie, ktoré bude mat dopad na ich životy.

Barry a Iris spájajú svoje sily, aby sa pokúsili zastaviť nebezpečnú silu, ktorá chce zničiť celé Central City.

Cisco a Kamilla povedia tímu, že opúšťajú Central City. Barry, Iris a Caitlin však nemajú dostatok času na to spracovať túto správu, pretože sa v meste objaví nový Rainbow Raider, kvôli ktorému musí pôvodný Flashov tím spolupracovať ešte posledný krát, aby zachránili mesto.

Cecile je nútená čeliť svojej minulosti, aby sa dostala z psychického zajatia. Chester prevezme Ciscovu prácu, ale urobí chybu, ktorá vystaví Barryho veľkému nebezpečenstvu. Joe vyšetruje vojenskú minulosť Kristen Kramer a odhalí znepokojivú pravdu.

Keď sa Ultraviolet vráti do Central City, Allegra je odhodlaná nájsť svoju sesternicu a odhovoriť ju od páchania zla. Joe nájde dôkaz toho, že Kristen Kramer nemusí byť tak dobrou policajtkou, akou sa na prvý pohľad zdá.

Keď armáda Godspeedov napadne Central City, Barry a Iris musia odložiť svoje rodinné plány a zamerať sa na najnovšiu hrozbu, ktorá ohrozuje ich domov. Chillblaine je prepustený z väzenia a tvrdí, že sa napravil, Frost mu však neverí.

John Diggle prichádza do Central City, aby Barrymu dal zbraň, vďaka ktorej by mohol zastaviť Godspeedov. Nové puto medzi Allegrou a Ultraviolet čelí záverečnej skúške, zatiaľ čo sú Joe a Kristen Kramer prenasledovaní jedným z jej bývalých kolegov.

Barry a Iris privítajú svoje deti XS a Barta z budúcnosti, počas čoho však dôjde k šokujúcemu odhaleniu, ktoré ohrozí ich novú rodinnú harmóniu. Vojna s Godspeedmi medzitým naberá na obrátkach, pretože je v stávke osud celého mesta.

Tím Flash získa na svoju stranu veľa rýchlych spojencov, medzi ktorých patria aj Iris a jej deti z budúcnosti - Bart a Nora. S ich pomocou prišiel čas na ukončenie vojny rýchlikov a porazenie hrozivého protivníka Godspeeda.

When a powerful alien threat arrives on Earth under mysterious circumstances, Barry, Iris and the rest of Team Flash are pushed to their limits in a desperate battle to save the world. But with time running out and the fate of humanity at stake, Flash and his companions will also need to enlist the help of some old friends if the forces of good are to prevail.

Despero warns The Flash that great tragedies will befall the speedster and cause him to lose his mind. Once that happens, Armageddon will begin. Determined to prove Despero wrong, Barry doubles down on proving his innocence but a devastating revelation from Iris pushes him to the edge and sends him to seek counsel from Black Lightning.

Barry meets Black Lightning at the Hall of Justice after things take a dire turn with Despero. Iris suspects something is off with Despero's vision of the future so she seeks help from a powerful ally.

Barry is shocked when Eobard Thawne returns in the most unexpected way, and with a tie to a loved one. Damien Darhk offers advice to Barry but there is a catch. An epic battle begins with Reverse Flash pitted against The Flash, Team Flash, Batwoman, Sentinel and Ryan Choi.

An opportunity presents itself for The Flash to end his lifelong battle with Reverse Flash for good, but the payoff could be too much for Barry and team to handle. Meanwhile, Mia Queen drops in from the future looking to save a lost loved one, and she won't let anything stand in her way.

After returning home from a visit for their parent's vow renewal, Bart and Nora quickly realize that things are not exactly as they left them. The duo race to repair any fissures in the timeline and restore everything back to the way it is supposed to be.

When a criminal invades the CCPD, Barry and Kramer must trust and rely on each other if they are going to make it out safely. Meanwhile, Caitlin learns a valuable lesson while out with Snow and Mark.

Barry trusts his instincts during a murder investigation, believing the suspect, despite the overwhelming evidence against him, meanwhile Iris gives Allegra an opportunity to be a mentor.

Barry and Team Flash get closer to figuring out the Fire Meta but no closer to finding him meanwhile Iris, needing a distraction, follows a story to Coast City.

Barry's desire to keep Team Flash safe is tested when Frost recklessly courts danger as she tries to stop the "Black Flame," meanwhile, Iris tries to help a teen girl reunite with her mother but unintentionally does more harm than good.

Barry and Chester may have found a way to stop the "Black Flame" from hurting anyone else meanwhile Caitlin decides to handle a situation on her own, possibly putting more innocent lives in danger.

With a new Meta terrorizing the city, Joe lends a hand to the local authorities, meanwhile Barry gets an assist from Cecille who helps to track the mass murderer.

Team Flash is under attack, and each must fight to save not only themselves but each other.

Team Flash uses the distraction of a bank robbing Meta to detract from the grief of losing someone they love.

The Flash gets an assist from XS. Meanwhile, CCPD enlists Chester for help when a mysterious device is found at a crime scene.

The Flash gets blasted with a shockwave forcing his body to age prematurely.

The Flash goes off the grid to look for answers about a new Meta in town. Meanwhile, Allegra pulls out all of the stops at CC Citizen Media, to protect a source and a friend.

With a new speedster in town, The Flash gets much more than he bargained for, meanwhile Cecile's powers experience a growth spurt allowing her to aid Team Flash on an entirely different level.

The Flash and team are in for the fight of their lives, meanwhile, Iris discovers the cause of her time sickness.

With The Flash still reeling from everything that just happened, the rest of the team rallies to support him when he needs it the most.