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 the persona of The Flash, the Fastest Man Alive, to protect his city.
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see all options Availability data: JustWatch
- Seasons
- 9
- Episodes aired
- 184
- Latest aired
- S09E13
- Total runtime
- 5d 8h
Timeline when each season aired
- Season 1 October 2014 – May 2015 23 episodes
- Season 2 October 2015 – May 2016 23 episodes
- Season 3 October 2016 – May 2017 23 episodes
- Season 4 October 2017 – May 2018 23 episodes
- Season 5 October 2018 – May 2019 22 episodes
- Season 6 October 2019 – May 2020 19 episodes
- Season 7 March 2021 – July 2021 18 episodes
- Season 8 November 2021 – June 2022 20 episodes
- Season 9 February 2023 – May 2023 13 episodes
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S01E01 Pilot
October 7 · 44min find the promo
Show synopsis
Barry discovers his powers and puts them to the test, only when he finds its no longer a test but the real thing when he encounters a certain someone.
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S01E02 Fastest Man Alive
October 14 · 41min find the promo
Show synopsis
Barry changes into the Flash when six gunmen storm a university event honoring a scientist, but his heroics don't match up to his expectations. Meanwhile, Iris becomes even more intrigued by the "red streak."
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S01E03 Things You Can't Outrun
October 21 · 41min find the promo
Show synopsis
Barry and the team go after the Mist, who possesses toxic gas powers, and they reflect on the night Caitlin's fiancé died. Meanwhile, Henry gets a long-awaited visit from Joe, and Iris and Eddie continue to keep their romance a secret from Joe.
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S01E04 Going Rogue
October 28 · 41min find the promo
Show synopsis
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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S01E05 Plastique
November 11 · 41min find the promo
Show synopsis
After a bomb explodes downtown, the army rolls in and takes over. When Joe learns Iris is writing about 'The Streak' and tries unsuccessfully to have the story stopped, Barry decides to have The Flash pay her a visit.
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S01E06 The Flash is Born
November 18 · 41min find the promo
Show synopsis
The Flash faces a new meta-human named Tony, who can turn himself into girded steel at will.
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S01E07 Power Outage
November 25 · 41min find the promo
Show synopsis
The Flash goes up against Farooq aka Blackout, a metahuman who can harness electricity.
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S01E08 Flash vs. Arrow (I)
December 2 · 41min find the promo
Show synopsis
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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S01E09 The Man in the Yellow Suit
December 9 · 42min find the promo
Show synopsis
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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S01E10 Revenge of the Rogues
January 20 · 41min find the promo
Show synopsis
While Barry strives to become fast enough to defeat Reverse-Flash, Captain Cold returns to Central City with a partner and takes Caitlin hostage to force a confrontation with the Flash.
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S01E11 The Sound and the Fury
January 27 · 41min find the promo
Show synopsis
Dr. Wells' former protégé, Hartley Rathaway, returns to seek revenge on his mentor. Meanwhile, Iris is hired as a cub reporter; Cisco recalls his first day on the job at S.T.A.R. Labs; and Joe asks Eddie for a favor but asks him to keep it a secret from Barry.
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S01E12 Crazy for You
February 3 · 41min find the promo
Show synopsis
Caitlin takes Barry out to a local karaoke bar to help them both find new loves. Caitlin strikes out but Barry meets a sports reporter and asks her out for a date. Meanwhile, Cisco considers Hartley's dangerous offer; and the team search for Shawna, a meta-human with teleportation powers who just busted her boyfriend out of Iron Heights.
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S01E13 The Nuclear Man
February 10 · 41min find the promo
Show synopsis
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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S01E14 Fallout
February 17 · 41min find the promo
Show synopsis
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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S01E15 Out of Time
March 17 · 40min find the promo
Show synopsis
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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S01E16 Rogue Time
March 24 · 41min find the promo
Show synopsis
The Flash learns that Captain Cold and Heat Wave have returned to Central City. This time Snart has brought along his baby sister Lisa to help wreak havoc on the city.
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S01E17 Tricksters
March 31 · 41min find the promo
Show synopsis
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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S01E18 All Star Team Up
April 14 · 41min find the promo
Show synopsis
Felicity and Ray Palmer pay a visit to S.T.A.R. Labs for help getting Ray's ATOM suit to work, and ask Cisco for help. Meanwhile, a young tech expert raises havoc with her insect drones, and Barry asks Ray for help dealing with her.
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S01E19 Who Is Harrison Wells?
April 21 · 41min find the promo
Show synopsis
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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S01E20 The Trap
April 28 · 41min find the promo
Show synopsis
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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S01E21 Grodd Lives
May 5 · 41min find the promo
Show synopsis
While Barry tries to find Eddie, a mysterious mind-controlled thief launches attacks on Central City's gold reserves. The team soon discovers that a telepathic gorilla is behind the robberies... and is following Harrison's commands. Meanwhile, Iris confronts Barry, while Harrison prepares to return home.
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S01E22 Rogue Air
May 12 · 41min find the promo
Show synopsis
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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S01E23 Fast Enough
May 19 · 44min find the promo
Show synopsis
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.