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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!

Binge this in 5d 8h•Peaking at 8.7/10

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 speed. Teaming up with S.T.A.R. Labs, Barry takes on

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Episode Rankings

  1. #1 Fan Favorite
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    The Flash Season 9 Episode 10 - A New World (1)
    8.7/10(2567 votes)

    #1 - 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.

    Director:Eric Wallace
    Writers:Thomas Pound, Eric Wallace

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  2. The Flash Season 1 Episode 23 - Fast Enough
    8.5/10(14225 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.

    Director:Dermott Downs
    Writer:Unknown

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  3. The Flash Season 9 Episode 11 - A New World (2)
    8.3/10(1620 votes)

    #3 - A New World (2)

    S9:E11

    Iris is alarmed by Barry's disappearance and Cecile assures her everything will be ok, but does she know that for certain? Team Flash is affected by a mysterious substance and Khione develops a better understanding of what she can and cannot control.

    Director:Kayla Compton
    Writer:Unknown

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  4. The Flash Season 1 Episode 15 - Out of Time
    8.2/10(16534 votes)

    #4 - 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.

    Director:Thor Freudenthal
    Writers:Todd Helbing, Aaron Helbing

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  5. The Flash Season 1 Episode 20 - The Trap
    8.2/10(8493 votes)

    #5 - 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.

    Director:Steve Shill
    Writers:Alison Schapker, Brooke Roberts

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  6. The Flash Season 1 Episode 22 - Rogue Air
    8.2/10(7886 votes)

    #6 - 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.

    Director:Douglas Aarniokoski
    Writers:Todd Helbing, Aaron Helbing

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    The 20 WORST Episodes of The Flash

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  7. The Flash Season 3 Episode 22 - Infantino Street
    8.2/10(5386 votes)

    #7 - 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.

    Director:Michael A. Allowitz
    Writer:Unknown

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  8. The Flash Season 5 Episode 8 - What's Past Is Prologue
    8.2/10(4095 votes)

    #8 - 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.

    Director:Tom Cavanagh
    Writers:Todd Helbing, Lauren Certo

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  9. The Flash Season 5 Episode 18 - Godspeed
    8.2/10(3080 votes)

    #9 - Godspeed

    S5:E18

    After discovering that Nora is working with Thawne, Barry and Iris disagree about how to handle their daughter in the wake of this shocking news. Team Flash isn't sure they can trust Nora, so they go through her journal to find out exactly how she came to work alongside their greatest nemesis.

    Director:Danielle Panabaker
    Writers:Judalina Neira, Kelly Wheeler

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  10. The Flash Season 1 Episode 9 - The Man in the Yellow Suit
    8.1/10(9743 votes)

    #10 - 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.

    Director:Ralph Hemecker
    Writers:Todd Helbing, Aaron Helbing

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  11. The Flash Season 1 Episode 19 - Who Is Harrison Wells?
    8.1/10(7246 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.

    Director:Wendey Stanzler
    Writers:Cortney Norris, Ray Utarnachitt

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  12. The Flash Season 2 Episode 8 - Legends of Today (I)
    8.1/10(6504 votes)

    #12 - Legends of Today (I)

    S2:E8

    Vandal Savage arrives in Central City and sets his sights on Kendra Saunders. After Vandal attacks Kendra and Cisco, they turn to Barry for help. Realizing how dangerous Vandal is, Barry takes Kendra to Star City and asks Oliver and team to hide her until he can figure out how to stop Vandal. However, things quickly go from bad to worse when a man with wings AKA Hawkman shows up and flies off with Kendra. Meanwhile, Harrison develops a serum to make Barry run faster and asks Jay to test it out. The crossover continues on Arrow S04E08 Legends of Yesterday (II).

    Director:Ralph Hemecker
    Writer:Unknown

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  13. The Flash Season 4 Episode 15 - Enter Flashtime
    8.1/10(5085 votes)

    #13 - 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.

    Director:Gregory Smith
    Writers:Todd Helbing, Sterling Gates

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  14. The Flash Season 5 Episode 9 - Elseworlds (I)
    8.1/10(4303 votes)

    #14 - Elseworlds (I)

    S5:E9

    When Barry Allen and Oliver Queen wake up one morning and realize they have swapped bodies with each other, the two set off to find out what disturbed the timeline to cause such a shift. However, things quickly go from bad to worse when they present their case to Team Flash and the gang doesn’t believe them. Barry and Oliver realize they need Supergirl’s help and travel to Smallville on Earth-38 where they end up meeting Kara’s cousin, Clark Kent, and intrepid reporter, Lois Lane. The crossover continues on Arrow S07E09 Elseworlds (II) and Supergirl S04E09 Elseworlds (III).

    Director:Kevin Tancharoen
    Writers:Sam Chalsen, Eric Wallace

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  15. The Flash Season 5 Episode 22 - Legacy
    8.1/10(3305 votes)

    #15 - Legacy

    S5:E22

    Barry faces off with his oldest, and most formidable nemesis, Reverse Flash.

    Director:Gregory Smith
    Writer:Unknown

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  16. The Flash Season 9 Episode 1 - Wednesday Ever After
    8.1/10(1940 votes)

    #16 - Wednesday Ever After

    S9:E1

    Barry creates a map book to guide him and Iris throughout their future in order to keep her safe, but the results are not what he expected, and instead, they relive the same day over and over again. Joe has a heart-to-heart with Cecile. A new big bad is introduced to Team Flash and friends and foes, old and new, begin to descend upon Central City.

    Director:Vanessa Parise
    Writer:Unknown

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  17. The Flash Season 2 Episode 6 - Enter Zoom
    8.0/10(8692 votes)

    #17 - Enter Zoom

    S2:E6

    After recent events, Barry decides it’s time to confront Zoom and comes up with a dangerous plan. Caitlin sides with Jay and deems it too dangerous for Barry to engage with the speed demon. However, Iris shows her support and brings forth a surprising ally. We see what Earth-2 Harrison Wells’ life was like before coming through the breech.

    Director:J.J. Makaro
    Writers:Brooke Roberts, Gabrielle Stanton

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  18. The Flash Season 2 Episode 13 - Welcome to Earth-2
    8.0/10(7095 votes)

    #18 - Welcome to Earth-2

    S2:E13

    Barry, Wells and Cisco journey to Earth-2 to rescue Wells’ daughter, Jesse from Zoom. Barry is stunned when he runs into Earth-2 Iris and Joe, but nothing prepares him for meeting Killer Frost and Deathstorm. Meanwhile, back on Earth-1, Jay has to take over the Flash’s responsibilities when a meta-human nicknamed Geomancer attacks Central City.

    Director:Millicent Shelton
    Writers:Greg Berlanti, Andrew Kreisberg

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  19. The Flash Season 7 Episode 2 - The Speed of Thought
    8.0/10(2817 votes)

    #19 - The Speed of Thought

    S7:E2

    When Barry suddenly gains the power of speed thinking, he attempts to use his new gift to save Iris. While Barry is thrilled with his new power, Cisco is hesitant to trust it. Meanwhile, Eva must face a shattering truth.

    Director:Alexandra La Roche
    Writers:Jonathan Butler, Gabriel Garza

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  20. The Flash Season 9 Episode 2 - Hear No Evil
    8.0/10(1695 votes)

    #20 - Hear No Evil

    S9:E2

    Barry feels guilty for what happened to Caitlin, and Mark comes up with a plan that makes everyone skeptical. Meanwhile, Red Death looms in Central City and commands that failure is not an option. Joe asks Cecile to make a choice that leads Cecile to think about the greater good. Allegra and Chester take a step in a new direction. Lastly, old friends pay an unexpected visit to S.T.A.R. Labs.

    Director:Eric Wallace
    Writers:Jonathan Butler, Kristen Kim

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  21. The Flash Season 9 Episode 5 - Mask of the Red Death (2)
    8.0/10(1605 votes)

    #21 - Mask of the Red Death (2)

    S9:E5

    As the Red Death wreaks havoc on Central City, Barry and Iris come up with a plan and turn to Cecile for help. Barry is faced with what he thinks was his greatest mistake and the Red Death's greatest success. Khione wants to help Team Flash, but Barry can't risk losing her. Joe gives Barry a much-needed pep talk.

    Director:Rachel Talalay
    Writer:Unknown

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  22. The Flash Season 9 Episode 8 - Partners in Time
    8.0/10(1536 votes)

    #22 - Partners in Time

    S9:E8

    A seemingly simple mold inspection at S.T.A.R. Labs leads to unexpected time anomalies. Barry and Iris try to make sense of the confusion - and figure out how to get back to their reality. Chester admits a secret to Allegra, which makes things awkward between the two, and Allegra relies on Cecile to act as a buffer. Meanwhile, Khione meets with an old friend of Team Flash.

    Director:Ed Fraiman
    Writers:Joshua V. Gilbert, Sarah Tarkoff

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  23. The Flash Season 1 Episode 8 - Flash vs. Arrow (I)
    7.9/10(10051 votes)

    #23 - 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.

    Director:Glen Winter
    Writer:Unknown

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  24. The Flash Season 1 Episode 17 - Tricksters
    7.9/10(7865 votes)

    #24 - 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.

    Director:Ralph Hemecker
    Writer:Andrew Kreisberg

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  25. The Flash Season 3 Episode 20 - I Know Who You Are
    7.9/10(5029 votes)

    #25 - 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.

    Director:Hanelle M. Culpepper
    Writers:Joshua V. Gilbert, Bronwen Clark

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Best Episodes Summary

"A New World (1)" is the best rated episode of "The Flash". It scored 8.7/10 based on 2567 votes. Directed by Eric Wallace and written by Thomas Pound, Eric Wallace, it aired on 5/3/2023. This episode scored 0.2 points higher than the second highest rated, "Fast Enough".