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The Best Episodes of The Flash Season 6

Every episode of The Flash Season 6 ranked from best to worst. Discover the Best Episodes of The Flash Season 6!

Binge this in 13h 17m·Peaking at 8.8/10
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Episode Rankings

  1. #1 Fan Favorite
    The Flash Season 6 Episode 9 - Crisis on Infinite Earths: Part Three (III)
    8.8/10(3984 votes)

    S6:E9

    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.

    Director:David McWhirter
    Writer:Unknown

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  2. The Flash Season 6 Episode 7 - The Last Temptation of Barry Allen (1)
    8.4/10(3034 votes)

    S6:E7

    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.

    Director:Chad Lowe
    Writers:Gabriel Garza, Jonathan Butler

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  3. The Flash Season 6 Episode 8 - The Last Temptation of Barry Allen (2)
    7.8/10(2581 votes)

    S6:E8

    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.

    Director:Michael Nankin
    Writers:Joshua V. Gilbert, Kristen Kim

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  4. The Flash Season 6 Episode 14 - Death of the Speed Force
    7.8/10(2205 votes)

    S6:E14

    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.

    Director:Brent Crowell
    Writers:Sam Chalsen, Emily Palizzi

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  5. The Flash Season 6 Episode 2 - A Flash of the Lightning
    7.7/10(2708 votes)

    S6:E2

    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.

    Director:Chris Peppe
    Writers:Jeff Hersh, Sam Chalsen

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  6. The Flash Season 6 Episode 15 - The Exorcism of Nash Wells
    7.6/10(2075 votes)

    S6:E15

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

    Director:Eric Dean Seaton
    Writers:Sterling Gates, Lauren Barnett

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  7. The Flash Season 6 Episode 13 - Grodd Friended Me
    7.5/10(2162 votes)

    S6:E13

    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.

    Director:Stefan Pleszczynski
    Writers:Joshua V. Gilbert, Kristen Kim

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  8. The Flash Season 6 Episode 1 - Into The Void
    7.4/10(3025 votes)

    S6:E1

    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.

    Director:Gregory Smith
    Writers:Eric Wallace, Kelly Wheeler

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  9. The Flash Season 6 Episode 4 - There Will Be Blood
    7.4/10(2503 votes)

    S6:E4

    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.

    Director:Marcus Stokes
    Writers:Lauren Certo, Sterling Gates

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  10. The Flash Season 6 Episode 17 - Liberation
    7.4/10(2116 votes)

    S6:E17

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

    Director:Jeffrey W. Byrd
    Writers:Gabriel Garza, Jonathan Butler

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  11. The Flash Season 6 Episode 5 - Kiss Kiss Breach Breach
    7.3/10(2468 votes)

    S6:E5

    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.

    Director:Menhaj Huda
    Writers:Joshua V. Gilbert, Kelly Wheeler

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  12. The Flash Season 6 Episode 6 - License to Elongate
    7.3/10(2514 votes)

    S6:E6

    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.

    Director:Danielle Panabaker
    Writers:Jeff Hersh, Thomas Pound

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  13. The Flash Season 6 Episode 3 - Dead Man Running
    7.2/10(2522 votes)

    S6:E3

    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.

    Director:Sarah Boyd
    Writers:Thomas Pound, Lauren Barnett

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  14. The Flash Season 6 Episode 18 - Pay the Piper
    7.0/10(2028 votes)

    S6:E18

    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.

    Director:Amanda Tapping
    Writer:Jess Carson

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  15. The Flash Season 6 Episode 12 - A Girl Named Sue
    6.9/10(2168 votes)

    S6:E12

    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.

    Director:Chris Peppe
    Writers:Lauren Certo, Thomas Pound

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  16. The Flash Season 6 Episode 10 - Marathon
    6.8/10(2266 votes)

    S6:E10

    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.

    Director:Stefan Pleszczynski
    Writers:Sam Chalsen, Lauren Barnett

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  17. The Flash Season 6 Episode 16 - So Long and Goodnight
    6.6/10(2103 votes)

    S6:E16

    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.

    Director:Alexandra La Roche
    Writers:Thomas Pound, Kristen Kim

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  18. The Flash Season 6 Episode 19 - Success Is Assured
    6.6/10(2223 votes)

    S6:E19

    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.

    Director:Phil Chipera
    Writers:Kelly Wheeler, Lauren Barnett

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  19. The Flash Season 6 Episode 11 - Love Is a Battlefield
    4.9/10(2770 votes)

    S6:E11

    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.

    Director:Sudz Sutherland
    Writers:Jeff Hersh, Kelly Wheeler

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Season 6 Ratings Summary

"Crisis on Infinite Earths: Part Three (III)" is the best rated episode of The Flash season 6. It scored 8.8/10 from 3,984 votes. Directed by David McWhirter and written by Unknown, it aired on December 10, 2019. This episode is rated 0.4 points higher than the second-best, "The Last Temptation of Barry Allen (1)".