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Season guide

The Flash: Season 1

22 episodes Premiered Sep 20, 1990 Updated Jul 30, 2026

The Flash season 1 is a television series that follows the story of Barry Allen, a forensic scientist who gains superspeed after being struck by lightning in his lab. He creates a superhero identity for himself to fight crime in Central City. Research scientist Dr. Tina McGee helps Barry fight crime while trying to understand his powers. Barry also tries to maintain a private life and keep his superhero identity from

Season overview

The Flash season 1 is a television series that follows the story of Barry Allen, a forensic scientist who gains superspeed after being struck by lightning in his lab. He creates a superhero identity for himself to fight crime in Central City. Research scientist Dr. Tina McGee helps Barry fight crime while trying to understand his powers. Barry also tries to maintain a private life and keep his superhero identity from his colleagues and friends. The series is based on the Barry Allen incarnation of DC Comics and developed by Greg Berlanti, Andrew Kreisberg, and Geoff Johns. It airs on The CW and is a part of the larger DC Comics universe. The show features high-octane action and inventive uses of Barry's powers as he battles metahuman criminals and cosmic threats while protecting Central City.

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Season 1 Episodes

Episode Guide

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Binge Efficiency Engine

Season 1: Filler vs. Essential Canon

Filter episodes by narrative weight. Focus on essential mytharc and skip standalone side quests.

14%
86%
Mytharc (3): Crucial lore & season climaxes
Core (19): Character development & subplots
Side Quest (0): Standalone / filler
S1·E1 Mytharc

Pilot

Sep 20, 1990 · 94 min

A laboratory accident endows a police scientist with the ability to move at superhuman speed which he uses to battle a menacing gang as a superhero.

S1·E2 Core

Out of Control

Sep 27, 1990 · 47 min

Homeless people are dying and their bodies are disappearing. Tina rekindles a relationship with a former colleague who is an expert in genetic engineering.

S1·E3 Core

Watching the Detectives

Oct 18, 1990 · 48 min

The corrupt District Attorney Thomas Castillo hires a private eye named Megan Lockhart to find out the Flash's identity. He then blackmails Barry to work for him, or he'll expose h

S1·E4 Core

Honor Among Thieves

Oct 25, 1990 · 46 min

While arranging security at the Central City Museum, Barry is reunited with an old girlfriend and a former mentor.

S1·E5 Core

Double Vision

Nov 1, 1990 · 47 min

Someone spreads graffiti, and messages asking to meet "Flash" at a church. Barry goes to the church. Shortly after that, he begins to experience black outs and memory losses.

S1·E6 Core

Sins of the Father

Nov 8, 1990 · 47 min

A bank robber escapes from prison. He goes back to Central City to get his money and revenge on the cop who busted him, Henry Allen, Barry's father.

S1·E7 Core

Child's Play

Nov 15, 1990 · 48 min

An orphan boy has information that incriminates a 1960s cult figure who is trying to make a comeback.

S1·E8 Core

Shroud of Death

Nov 29, 1990 · 47 min

Pieces of a broken medallion are the only clue to an unknown assassin who is on a deadly rampage in central city.

S1·E9 Core

Ghost in the Machine

Dec 13, 1990 · 47 min

Barry befriends an African American who was once a super hero that defeated a terrorist called the Ghost, who blackmailed the city through television sets. When the presumed dead c

S1·E10 Core

Sight Unseen

Jan 10, 1991 · 48 min

An invisible man gets into Star Labs, and releases a neurotoxin with Tina inside the lab. Then he starts killing scientists who worked on the project. Flash must find the invisible

S1·E11 Core

Beat the Clock

Jan 31, 1991 · 47 min

A jazz musician friend of Julio's is about to be executed. An hour before the execution, a friend calls and says he has evidence that could exonerate their friend. Before Barry can

S1·E12 Core

The Trickster

Feb 7, 1991 · 48 min

Barry must protect his old girlfriend, Megan Lockhart, from an obsessed, maniacal criminal disguised as The Trickster.

S1·E13 Core

Tina, Is That You?

Feb 14, 1991 · 48 min

Barry is having trouble sleeping. Tina tries to use bio-feedback to help him, but it back fires on Tina. She joins a gang, and she's able to hold Flash at bay with her knowledge of

S1·E14 Core

Be My Baby

Feb 21, 1991 · 48 min

Barry tries to help a young woman. She found out about her husband's criminal life, and is trying to escape from him. She takes their daughter with her, but he wants them back.

S1·E15 Core

Fast Forward

Feb 27, 1991 · 47 min

Jay's killer, Nicholus Pike, is released from jail and blames the Flash for Jay's death. He sets the Flash up by using a heat seeking bomb on him, but something goes awry. Instea

S1·E16 Core

Deadly Nightshade

Mar 30, 1991 · 48 min

There's a new vigilante in town, the Deadly Nightshade, who fights crime by killing criminals. The Flash and the original Nightshade team up to take him down.

S1·E17 Core

Captain Cold

Apr 6, 1991 · 48 min

Captain Cold, who freezes his victims to death, is contracted to kill the Flash.

S1·E18 Core

Twin Streaks

Apr 13, 1991 · 45 min

A scientist and his business partner are trying to develop a being with super speed, their attempts fail. They manage to clone the Flash. Their creation learns quickly, but is emot

S1·E19 Core

Done with Mirrors

Apr 27, 1991 · 45 min

A battery is stolen by a criminal calling himself the Mirror Master. He soon steals a crystal from Star Labs. Tina will get fired if they can't recover the crystal. Tina's mother c

S1·E20 Core

Good Night, Central City

May 4, 1991 · 45 min

A small time crook gets a hold of a device that puts people to sleep. He goes on a spree while the people are unconscious. He has a plan to knock out the entire city, it's up to th

S1·E21 Mytharc

Alpha

May 11, 1991 · 45 min

An android built by the government to use an assassin refuses to obey her orders. She escapes, and is befriended by Tina and Barry.

S1·E22 Mytharc

The Trial of the Trickster

May 18, 1991 · 45 min

With the help of an insane admirer who wants to be his sidekick, the Trickster escapes from police custody and places the Flash under his mind control.

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