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The Best Episodes Of 'The Flash'

Updated May 11, 2021 18.2k votes 1.3k voters 14.7k views131 items

There are so many good episodes of The Flash, but which ones really stand out? Do you like "Fast Enough" the best, or is "Flash vs. Arrow" your favorite episode of The Flash? To determine once and for all what the best episodes of The Flash are, let's rank every episode of The Flash from best to worst.

The Flash on CW is a superhero TV series based on the DC Comics character Barry Allen, AKA Flash. Starring Grant Gustin as the eponymous hero, The Flash was conceived as a spinoff of Arrow (Green Arrow). The series premiered on October 7, 2014 and has had crossover episodes with both Arrow and Supergirl. The series is critically acclaimed, with the second season having a 94% score on Rotten Tomatoes.

Vote up your favorite episodes of The Flash, and vote down any bad episodes that you really didn't enjoy, despite how much you love the series as a whole. It can be painful to put one The Flash episode over the other when there are so many good ones, which is why you can vote on however many episodes you like.

  • 1

    Fast Enough

    May 19, 2015

    Season 1, Episode 23

    In the season one finale, Wells presents Barry with a life-altering choice, while Dr. Martin Stein and Ronnie Raymond (aka Firestorm) return to help the S.T.A.R. Labs team.

  • 2

    Season 1, Episode 9

    When Barry finds himself face to face with his nemesis, the Man in the Yellow Suit (aka Reverse Flash), who killed his mother, he turns to Dr. Tina McGee (AMANDA PAYS) for help.

  • 3

    Season 2, Episode 23

    In the Season Two finale, Zoom reveals his true plan and Barry vows to do whatever it takes to stop him.

  • 4

    Season 1, Episode 19

    While Joe and Cisco head to Starling City for answers about Dr. Wells from Capt. Lance, Barry races to catch a meta-human who can transform into anyone he touches.

  • 5

    Out Of Time

    March 17, 2015

    Season 1, Episode 15

    Mark Mardon aka The Weather Wizard appears in Central City to avenge his brother's death at the hands of Joe. And Cisco realizes that Dr. Wells is hiding something.

  • 6

    Enter Zoom

    November 10, 2015

    Season 2, Episode 6

    Barry comes up with a dangerous plan to defeat Zoom. Although Caitlin sides with Jay and deems it too dangerous, Iris shows her support with a surprising ally.

  • 7

    Escape From Earth-2

    February 16, 2016

    Season 2, Episode 14

    In the conclusion to their Earth-2 journey, the team races to find Zoom's lair by asking for help from an unexpected source. Back on Earth-1, Caitlin rushes to perfect Velocity-9.

  • 8

    Rogue Air

    May 12, 2015

    Season 1, Episode 22

    As Wells once again gets the upper hand on the S.T.A.R. Labs team, Barry reaches out to an old foe, Captain Cold, and friends, the Arrow and Firestorm, for help.

  • 9

    Welcome To Earth-2

    February 9, 2016

    Season 2, Episode 13

    Barry, Wells & Cisco journey to Earth-2 to rescue Wells' daughter, Jesse, and Barry's stunned when he meets Killer Frost (DANIELLE PANABAKER) and Deathstorm (ROBBIE AMELL).

  • 10


    October 7, 2014

    Season 1, Episode 1

    In the series premiere, Central City forensic scientist Barry Allen (GRANT GUSTIN) is accidentally given the power of super speed in a freak particle accelerator accident.

  • 11

    Flash Back

    March 29, 2016

    Season 2, Episode 17

    Determined to stop Zoom forever by increasing his speed, Barry travels back in time to consult his former mentor/nemesis Harrison Wells/Eobard Thawne.

  • 12

    The Trap

    April 28, 2015

    Season 1, Episode 20

    Barry, Caitlin, Cisco & Joe set a trap for Wells - using Cisco as bait. Meanwhile, Eddie makes a decision regarding Iris that leaves him unsettled.

  • 13

    Flash Vs. Arrow

    December 2, 2014

    Season 1, Episode 8 

    In the first part of the epic crossover event with The Flash and Arrow, Barry is thrilled when Oliver, Felicity and Diggle join him in Central City to help stop a meta-human.

  • 14

    Infantino Street

    May 16, 2017

    Season 3, Episode 22

    With only 24 hours left to save Iris from Savitar, Barry decides to use any means necessary and turns to Captain Cold (WENTWORTH MILLER) for help.

  • 15

    Crisis On Earth-X, Part 3

    November 28, 2017

    Season 4, Episode 8

    When villains from Earth-X attack the wedding ceremony of Barry and Iris, the Green Arrow, Supergirl, The Flash and White Canary unite their teams to save the world.

  • 16


    November 29, 2016

    Season 3, Episode 8

    When aliens called the Dominators attack Central City, Barry asks for help from the Green Arrow, the Legends of Tomorrow and Supergirl in the first part of the epic crossover event.

  • 17

    Season 2, Episode 21

    With Barry gone, the team must figure out a way to handle the return of an old enemy - Girder (GREG FINLEY), by trying to trap him in S.T. A. R. Labs.

  • 18

    Versus Zoom

    April 19, 2016

    Season 2, Episode 18

    Equipped with the tachyon device, Barry believes he is fast enough to stop Zoom (TEDDY SEARS) and convinces Wells and Cisco to open the breaches to catch him.

  • 19

    Season 3, Episode 19

    Barry travels to the future to find out Savitar’s identity in hopes of finding Iris, but in 2024, he encounters future versions of Team Flash who are very different people.

  • 20

    Season 3, Episode 20

    Barry and the team meet Tracy Brand (ANNE DUDEK), a scientist, who may be the key to stopping Savitar. Unfortunately, Killer Frost is also after Tracy.

  • 21

    Season 2, Episode 11

    When Cisco gets a vibe of Eobard Thawne, Barry and the team don't believe it. But, after an attack at Mercury Labs, Christina McGee confirms that the Reverse-Flash is back.

  • 22

    Running To Stand Still

    December 8, 2015

    Season 2, Episode 9

    Villains James Jesse (MARK HAMILL), Capt. Cold and the Weather Wizard (LIAM McINTYRE) run amok in Central City during Chistmas. KEIYNAN LONSDALE joins the cast as Wally West.

  • 23

    Enter Flashtime

    March 6, 2018

    Season 4, Episode 15

    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.

  • 24


    March 31, 2015

    Season 1, Episode 17

    MARK HAMILL (Star Wars) reprises his role as James Jesse aka The Trickster, when a copycat killer (DEVON GRAYE) starts setting bombs off in Central City.

  • 25

    Killer Frost

    November 22, 2016

    Season 3, Episode 7

    In order to save Barry, Caitlin uses her powers, but the effort unleashes her inner Killer Frost, who ends up battling both The Flash and Vibe. Kevin Smith directs.