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The Best Episodes of The Flash

Every episode of The Flash ranked from best to worst. Let's dive into the Best Episodes of The Flash!

The Best Episodes of The Flash

After being struck by lightning, CSI investigator Barry Allen awakens from a nine-month coma to discover he has been granted the gift of super...

Seasons9

  1. Background image for Out of Time
    9.6/10(15.8k votes)

    #1 - Out of Time

    S1:E15

    Mark Mardon, having survived his apparent death during the black-matter explosion, returns seeking revenge on Joe for the death of his brother Clyde... and has the same weather-manipulation powers as his deceased sibling.

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  2. Background image for Fast Enough
    9.5/10(13.6k votes)

    #2 - Fast Enough

    S1:E23

    Wells presents Barry with a life-changing choice. Dr. Martin Stein and Ronnie Raymond return to help the S.T.A.R. Labs team with this final fight.

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    Director:Dermott Downs
    Writer:Unknown
  3. Background image for The Trap
    9.3/10(8.0k votes)

    #3 - The Trap

    S1:E20

    Barry, Caitlin, Cisco and Joe set a trap for Wells. Cisco uses himself as prey which puts him in grave danger. Meanwhile, Eddie makes a decision regarding Iris, which leaves Joe a bit unsettled.

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  4. Background image for The Man in the Yellow Suit
    9.2/10(9.2k votes)

    #4 - The Man in the Yellow Suit

    S1:E9

    Barry enjoys the annual tradition of tree trimming and gift exchange with Joe and Iris. He gives Iris a touching gift, but the moment is interrupted by Eddie’s arrival.

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  5. Background image for Flash vs. Arrow (I)
    9.1/10(9.6k votes)

    #5 - Flash vs. Arrow (I)

    S1:E8

    Barry is thrilled when Oliver, Felicity and Diggle come to Central City to investigate a case involving a deadly boomerang. The crossover continues on Arrow S03E08 The Brave and the Bold.

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    Director:Glen Winter
    Writer:Unknown
  6. Background image for Tricksters
    9.0/10(7.4k votes)

    #6 - Tricksters

    S1:E17

    When a villain calling himself the Trickster runs rampant in Central City, Joe and Barry go to Iron Heights to talk with the original Trickster.

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  8. Background image for Rogue Air
    9.0/10(7.5k votes)

    #7 - Rogue Air

    S1:E22

    When Harrison activates the particle accelerator, the team has no choice but to evacuate the five metahuman prisoners. Unfortunately, with time running out, Barry has no choice but to turn to Captain Cold for help. Meanwhile, Eddie escapes but has some surprising news for Iris.

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  9. Background image for Invasion! (II)
    9.0/10(5.6k votes)

    #8 - Invasion! (II)

    S3:E8

    When aliens called the Dominators attack Central City, Barry speeds over to Star City to ask the Green Arrow for help in stopping them. Realizing the battle against the Dominators is bigger than they thought, they track down the Legends of Tomorrow, and Barry and Cisco create a breach to bring back a secret weapon – Supergirl. Once all of the super friends are assembled, they come up with a plan to attack but a shocking secret related to Flashpoint is revealed and suddenly no one is sure who they can trust. Meanwhile, Wally wants to join the battle against the aliens but Iris tells him he’s not ready. The crossover starts on Supergirl S02E08 Medusa (I). It continues on Arrow S05E08 Invasion! (III) and DC's Legends of Tomorrow S02E07 Invasion! (IV).

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    Director:Dermott Downs
    Writer:Unknown
  10. Background image for Infantino Street
    9.0/10(5.0k votes)

    #9 - Infantino Street

    S3:E22

    With only 24 hours left until Savitar murders Iris, Barry struggles to save the woman he loves and makes the choice to use any means necessary to do so. Realizing he has one option left to save her, The Flash turns to Captain Cold for help.

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  11. Background image for It's My Party and I'll Die If I Want To
    9.0/10(6 votes)

    #10 - It's My Party and I'll Die If I Want To

    S9:E9

    Team Flash throws a surprise birthday party for Barry, but things go terribly awry when Ramsey Rosso crashes the festivities.

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  12. Background image for Who Is Harrison Wells?
    8.9/10(6.8k votes)

    #11 - Who Is Harrison Wells?

    S1:E19

    Joe and Cisco go to Starling City to ask Quentin Lance for his help investigating the site of Harrison's car accident 15 years ago and determining what really happened. Meanwhile, Eddie is framed for a shooting by a shapeshifing metahuman who can take on the appearance of anyone he touches.

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  13. Background image for Enter Flashtime
    8.9/10(4.7k votes)

    #12 - Enter Flashtime

    S4:E15

    When a nuclear bomb detonates in downtown Central City, Barry, Jesse Quick and Jay Garrick slow down time by entering Flashtime. As everyone in the city is frozen, the three speedsters push themselves to the breaking point to save the city and everyone in it.

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  14. Background image for I Know Who You Are
    8.8/10(4.7k votes)

    #13 - I Know Who You Are

    S3:E20

    Barry and the team meet Tracy Brand, a scientist, who may be the key to stopping Savitar. Unfortunately, Killer Frost is also after Tracy so Team Flash must battle their old friend, which proves to be particularly difficult for Cisco. Joe and Cecile’s relationship takes a big turn.

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  15. Background image for Fallout
    8.7/10(6.5k votes)

    #14 - Fallout

    S1:E14

    Martin and Ronnie are separated, only to realize that they must learn how to rejoin before Eiling hunts them down and kills them... and the Flash. Meanwhile, Joe shows Barry the 3D images from the Nora Allen crime scene, and Barry asks Martin for advice on time travel.

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  16. Background image for A New World (1)
    8.7/10(6 votes)

    #15 - A New World (1)

    S9:E10

    As Iris receives word of a career milestone, Barry is suddenly nowhere to be found. In trying to get back home, Barry runs across many familiar faces. Khione continues to figure out her powers, and Chester works on a suit for Allegra.

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  17. Background image for Killer Frost
    8.6/10(4.4k votes)

    #16 - Killer Frost

    S3:E7

    Caitlin uses her powers to save Barry but as her mother predicted, the effort unleashes her inner Killer Frost. Killer Frost goes on a rampage looking for Dr. Alchemy, kidnapping Julian and battling both The Flash and Vibe. Meanwhile, Joe and H.R. have a heart to heart talk.

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    Director:Kevin Smith
    Writer:Unknown
  18. Background image for The Present
    8.6/10(4.2k votes)

    #17 - The Present

    S3:E9

    With Alchemy and Savitar still looming threats, Barry is unable to focus on the Christmas holiday, and especially his relationship with Iris. Determined to stop Savitar, Barry goes to Earth-3 to get advice from Jay Garrick. Wally wants to help Barry fight Savitar and reveals that he’s been training with H.R, which doesn’t go over well with Barry. As Cisco faces his first Christmas without his brother Dante, old wounds are reopened.

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    Writer:Unknown
  19. Background image for The Once and Future Flash
    8.6/10(4.1k votes)

    #18 - The Once and Future Flash

    S3:E19

    Barry travels to the future to find out Savitar’s still unknown identity in the hopes of saving Iris. Upon his arrival in 2024, Barry encounters future versions of his Team Flash friends, who, following the death of Iris, have become very different people, profoundly impacted by their showdown with Savitar. It will be up to Barry to infuse a sense of hope back into the team, as he proves to be hero his future friends have been waiting for. Meanwhile, back in 2017, the hunt for Killer Frost continues.

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  20. Background image for Crisis on Earth-X (III)
    8.6/10(4.5k votes)

    #19 - Crisis on Earth-X (III)

    S4:E8

    Barry and Iris's wedding brings the gang together, but things go awry when villains from Earth-X attack the ceremony. All of the superheroes band together with help from their super friends like Citizen Cold, The Ray, Felicity Smoak, Iris West and Alex Danvers to take on their most formidable villains yet. Earth's mightiest heroes - Green Arrow, Supergirl, The Flash and White Canary - lead their teams into battle to save the world. The crossover starts on Supergirl S03E08 Crisis on Earth X (I) and Arrow S06E08 Crisis on Earth X (II). It continues on DC's Legends of Tomorrow S03E08 Crisis on Earth X (IV).

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    Director:Dermott Downs
    Writer:Unknown
  21. Background image for The Nuclear Man
    8.5/10(6.1k votes)

    #20 - The Nuclear Man

    S1:E13

    While Barry, Harrison, and Caitlin hunt down Ronnie, who has attacked a man, Joe recruits Cisco to help him learn the truth about who murdered Nora Allen.

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  22. Background image for The Wrath of Savitar
    8.5/10(4.1k votes)

    #21 - The Wrath of Savitar

    S3:E15

    While training with Barry, Wally starts to have visions of Savitar, which he hides from the team. A dangerous secret threatens Barry and Iris’ happiness.

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  23. Background image for What's Past Is Prologue
    8.5/10(21 votes)

    #22 - What's Past Is Prologue

    S5:E8

    Barry and Team Flash come up with a plan to stop Cicada. However, the plan calls for Barry and Nora to travel back in time to gather some key necessities. However, Barry hesitates, concerned about his daughter seeing certain parts of his life. Meanwhile, Sherloque takes his concerns about Nora to Iris, and Caitlin turns up a key asset in the fight against Cicada.

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  24. Background image for Going Rogue
    8.4/10(7.2k votes)

    #23 - Going Rogue

    S1:E4

    The Flash battles Captain Cold after the villain is involved in a robbery and plots to steal the Kahndaq Dynasty Diamond.

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  25. Background image for Therefore I Am
    8.4/10(3.8k votes)

    #24 - Therefore I Am

    S4:E7

    Barry comes face to face with DeVoe. Devoe's past is revealed through flashbacks. Meanwhile, Iris puts the final touches on the wedding, which is a week away.

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  26. Background image for Don't Run
    8.4/10(3.6k votes)

    #25 - Don't Run

    S4:E9

    Amunet kidnaps Caitlin and puts meta-dampener handcuffs on her to keep her from turning into Killer Frost. Amunet tells Caitlin she needs her to perform a tricky medical task and if Caitlin fails, Amunet will kill her. Meanwhile, The Thinker traps The Flash in a speedster-proof prison. With the clock ticking, The Team doesn't have the time or resources to track both Caitlin and Barry so Iris is forced to choose who to save.

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Best Episodes Summary

"Out of Time" is the best rated episode of "The Flash". It scored 9.6/10 based on 15847 votes. Directed by Thor Freudenthal and written by Todd Helbing, Aaron Helbing, it aired on 3/17/2015. This episode scored 0.1 points higher than the second highest rated, "Fast Enough".