幼い頃に母親を殺害され、その犯人として父親が投獄されてしまった過去を持つバリー・アレン。幼いバリーは当時の捜査官、ウエスト刑事に引き取られて、その娘アイリスと共に育つ。大人になり科学者となった彼は、CSIの科学調査員としてセントラル・シティの警察に勤務。父親の無実を晴らすため、母親の殺人事件の真相を追る。幼なじみのアイリスへの淡い恋心を抱きつつも。 そんなある日、実験室で粒子加速器が爆発し、巻き込まれたバリーはこん睡状態に陥いる。長い眠りから覚めた彼は、自分に超人的な治癒力と、閃光（＝フラッシュ）がごとく、超高速で移動できる能力が備わっていること知り、“フラッシュ”として悪と闘うことを決意する。 胸に稲妻のマークが入った深紅のコスチュームを身にまとい、超高速で疾走しながら、自分の大切な人々を守りぬいてゆく。
放送日: 2014-10-07
上映時間: 44 min
概要: 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.
放送日: 2014-10-14
上映時間: 41 min
概要: 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."
放送日: 2014-10-21
上映時間: 41 min
概要: 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.
放送日: 2014-10-28
上映時間: 41 min
概要: The Flash battles Captain Cold after the villain is involved in a robbery and plots to steal the Kahndaq Dynasty Diamond.
放送日: 2014-11-11
上映時間: 41 min
概要: 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.
放送日: 2014-11-18
上映時間: 41 min
概要: The Flash faces a new meta-human named Tony, who can turn himself into girded steel at will.
放送日: 2014-11-25
上映時間: 41 min
概要: The Flash goes up against Farooq aka Blackout, a metahuman who can harness electricity.
放送日: 2014-12-02
上映時間: 41 min
概要: 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.
放送日: 2014-12-09
上映時間: 43 min
概要: 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.
放送日: 2015-01-20
上映時間: 42 min
概要: 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.
放送日: 2015-01-27
上映時間: 41 min
概要: 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.
放送日: 2015-02-03
上映時間: 41 min
概要: 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.
放送日: 2015-02-10
上映時間: 41 min
概要: 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.
放送日: 2015-02-17
上映時間: 41 min
概要: 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.
放送日: 2015-03-17
上映時間: 41 min
概要: 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.
放送日: 2015-03-24
上映時間: 41 min
概要: 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.
放送日: 2015-03-31
上映時間: 41 min
概要: 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.
放送日: 2015-04-14
上映時間: 41 min
概要: 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.
放送日: 2015-04-21
上映時間: 41 min
概要: 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.
放送日: 2015-04-28
上映時間: 41 min
概要: 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.
放送日: 2015-05-05
上映時間: 42 min
概要: 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.
放送日: 2015-05-12
上映時間: 41 min
概要: 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.
放送日: 2015-05-19
上映時間: 44 min
概要: 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.
