22 episodesFirst aired 20 September 1990
Barry Allen, a forensic scientist working for the Central City police, is struck by lightning and doused in chemicals in his lab. He develops superspeed and creates a superhero identity for himself to fight crime: The Flash. Research scientist Dr. Tina McGee works at S.T.A.R. Labs and helps Barry fight crime while trying to understand how his powers are developing. As well as his superheroics, Barry tries to maintain a private life, and tries to keep his superhero identity from his colleagues, his boss Lt. Garfield, and his best friend, Julio Mendez.
E1Sept 19901h 34m
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.
E2Sept 199047m
Homeless people are dying and their bodies are disappearing. Tina rekindles a relationship with a former colleague who is an expert in genetic engineering.
E3Oct 199048m
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 his secret.
E4Oct 199046m
While arranging security at the Central City Museum, Barry is reunited with an old girlfriend and a former mentor.
E5Nov 199047m
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.
E6Nov 199047m
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.
E7Nov 199048m
An orphan boy has information that incriminates a 1960s cult figure who is trying to make a comeback.
E8Nov 199047m
Pieces of a broken medallion are the only clue to an unknown assassin who is on a deadly rampage in central city.
E9Dec 199047m
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 criminal is defrosted, the Night Shade is back in business.
E10Jan 199148m
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 man and save his friend.
E11Jan 199147m
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 contact him, he disappears. They have less than an hour to save a condemned man.
E12Feb 199148m
Barry must protect his old girlfriend, Megan Lockhart, from an obsessed, maniacal criminal disguised as The Trickster.
E13Feb 199148m
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 his strengths and weaknesses. Barry has got to find a way to save his friend.
E14Feb 199148m
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.
E15Feb 199147m
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. Instead of killing the Flash, it sends him into the future where Pike is in charge and outlaws anyone from mentioning the Flash.
E16Mar 199148m
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.
E17Apr 199148m
Captain Cold, who freezes his victims to death, is contracted to kill the Flash.
E18Apr 199145m
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 emotional moral equivalent of a child. Barry must stop his twin.
E19Apr 199145m
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 comes for a visit, and an old friend of Barry's also stirs up trouble.
E20May 199145m
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 the Flash to stop him.
E21May 199145m
An android built by the government to use an assassin refuses to obey her orders. She escapes, and is befriended by Tina and Barry.
E22May 199145m
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.