<P> Barry Allen's classic stories introduced the concept of the Multiverse to DC Comics, and this concept played a large part in DC's various continuity reboots over the years . The Flash has traditionally always had a significant role in DC's major company - wide reboot stories, and in 1985's crossover Crisis on Infinite Earths, Barry Allen died saving the Multiverse, removing the character from the regular DC lineup for 23 years . His return to regular comics occurred subsequently in 2008 within the pages of Grant Morrison's Final Crisis crossover story and Geoff Johns' accompanying The Flash: Rebirth limited series . He has since played a pivotal role in the crossover stories Blackest Night (2009), Flashpoint (2011), Convergence (2015), and DC Rebirth (2016). </P> <P> The character has appeared in various adaptations in other media . John Wesley Shipp played Barry Allen in the 1990 CBS television series and Grant Gustin currently plays him in the 2014 The CW television series . The character is played by Ezra Miller in the DC Extended Universe, beginning with Batman v Superman: Dawn of Justice and Suicide Squad in 2016, followed by Justice League in 2017 . </P> <P> Barry Allen is a police scientist (his job title was changed to a forensic scientist in The Flash: Iron Heights one - shot) with a reputation for being very slow, and frequently late, which frustrates his fiancee, Iris West, as the result of being absent - minded and his devotion to crime - solving . One night, as he is working late, a lightning bolt shatters a case full of chemicals and spills all over Barry . As a result, Allen finds that he can run extremely fast and has matching reflexes and senses . He dons a set of red tights sporting a lightning bolt (reminiscent of the original Fawcett Comics Captain Marvel), dubs himself the Flash (after his childhood comic book hero, Jay Garrick), and becomes Central City's resident costumed crimefighter . Central City University professor Ira West (Iris' adoptive father) designed Allen's costume and the ring which stores it while Allen is in his civilian identity . The ring can eject the compressed clothing when Allen needs it and suck it back in with the aid of a special gas that shrinks the suit . In addition, Allen invented the cosmic treadmill, a device that allowed for precise time travel and was used in many stories . Allen was so well liked that nearly all speedsters that come after him are often compared to him . Batman once said "Barry is the kind of man that I would've hoped to become if my parents had not been murdered ." </P> <P> As presented in Justice League of America #9, when the Earth is infiltrated by alien warriors sent to conquer the planet, some of the world's greatest heroes join forces, Allen among them . While the superheroes individually defeat most of the invaders, they fall prey to a single alien and only by working together are they able to defeat the warrior . Afterwards, the heroes decide to find the Justice League . </P>

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