The Flash, the original Barry Allen version, made his first appearance in comics in Showcase #4, marking the character's debut and the beginning of the Silver Age of comic books.
Wally West debuted as Kid Flash in The Flash #110, establishing a sidekick character who would later become a major incarnation of The Flash.
The Flash television series starring John Wesley Shipp premiered, bringing the character to live-action TV audiences and expanding his popularity outside comic books.
The 2009 comic series 'Flash: Rebirth' by Geoff Johns and Ethan Van Sciver relaunched Barry Allen's story, reestablishing him as the primary Flash and revitalizing the character's role in the DC Universe.
The Flash TV series starring Grant Gustin premiered on The CW, becoming a significant and long-running adaptation that increased the character's mainstream appeal.
The Flash's standalone feature film starring Ezra Miller was released, marking a major live-action cinematic portrayal of the character and impacting his presence in the DC Extended Universe.
Barry Allen is struck by lightning caused by a particle accelerator explosion and gains his super-speed abilities, becoming The Flash.
The Flash faces off against Captain Cold, one of his earliest and most persistent villains, establishing a long-running rivalry.
The Reverse-Flash attacks Barry using time manipulation, causing severe disruptions in the timeline that The Flash must repair.
Barry alters the timeline to save his mother, resulting in the creation of the Flashpoint timeline, which nearly destroys reality before being fixed.
Barry masters control over the Speed Force, significantly enhancing his powers and abilities.
Barry confronts Zoom, a deadly speedster villain who threatens Central City and the entire timeline.
Barry temporarily joins the Titans to tackle a multiverse threat alongside other young heroes.
The Flash faces Godspeed, who challenges Barry's heroic methods while threatening innocent lives with lethal speed attacks.
Barry participates in the DC Rebirth event that resets many aspects of his history and redefines his role in the DC Universe.
