<Li> The unsuccessful 1997 Justice League of America pilot featured actor Kenny Johnston as a 20 - something, unemployed, Barry Allen . </Li> <Ul> <Li> Barry Allen was the Flash in the 1990s Flash live - action TV series, although this character incorporated elements of Wally's social life, as well as previously non-existent characters such as a brother and nephew . He was played by John Wesley Shipp . This version of the Flash reaches maximum speed upon breaking the sound barrier, at which point he has to stop to rest . CBS originally wanted to cast Jack Coleman, who declined the role to pursue a career in Broadway . As a police forensic scientist, Barry was working in the crime lab at the Central City Police Department headquarters when a lightning bolt struck his lab, dousing him in a combination of electricity and chemicals nearby . He discovered the accident gave him superhuman speed . With the help of S.T.A.R. Labs scientist Dr. Christina McGee, Barry learned how to control his powers with the help of a special prototype deep - sea diving suit . When Barry's older brother and police colleague Jay Allen was murdered by gang leader and Jay's former police partner Nicholas Pike, Barry wore a masked version of the suit and called himself the Flash . After capturing Pike, Barry sees his potentials of accomplishing some differences with his powers in a crime - ridden Central City, and started helping to bring other criminals to justice and provide hope to people as a masked superhero . This version of Flash was seen in an episode of The Flash (2014) as Barry, Dr. Harrison Wells, and Cisco Ramon travel through the multiverse, implying that this Flash lives in a separate universe in the Arrowverse and is a parallel universe counterpart of Arrowverse's Barry's father Henry Allen . </Li> <Li> The fifth episode of season 4 of Smallville, entitled "Run", featured speedster Bart Allen as Impulse (played by Kyle Gallner). He is portrayed as a self - centered teenager who uses his powers for personal gain, although by the end of the episode, he was showing signs of changing his ways . Bart also carries around identification of Jay Garrick, Barry Allen and Wally West, the three Flashes in the main DC Universe . After an appearance in the season six episode "Justice", Bart becomes a recurring character using the name Impulse . </Li> </Ul> <Li> Barry Allen was the Flash in the 1990s Flash live - action TV series, although this character incorporated elements of Wally's social life, as well as previously non-existent characters such as a brother and nephew . He was played by John Wesley Shipp . This version of the Flash reaches maximum speed upon breaking the sound barrier, at which point he has to stop to rest . CBS originally wanted to cast Jack Coleman, who declined the role to pursue a career in Broadway . As a police forensic scientist, Barry was working in the crime lab at the Central City Police Department headquarters when a lightning bolt struck his lab, dousing him in a combination of electricity and chemicals nearby . He discovered the accident gave him superhuman speed . With the help of S.T.A.R. Labs scientist Dr. Christina McGee, Barry learned how to control his powers with the help of a special prototype deep - sea diving suit . When Barry's older brother and police colleague Jay Allen was murdered by gang leader and Jay's former police partner Nicholas Pike, Barry wore a masked version of the suit and called himself the Flash . After capturing Pike, Barry sees his potentials of accomplishing some differences with his powers in a crime - ridden Central City, and started helping to bring other criminals to justice and provide hope to people as a masked superhero . This version of Flash was seen in an episode of The Flash (2014) as Barry, Dr. Harrison Wells, and Cisco Ramon travel through the multiverse, implying that this Flash lives in a separate universe in the Arrowverse and is a parallel universe counterpart of Arrowverse's Barry's father Henry Allen . </Li> <Li> The fifth episode of season 4 of Smallville, entitled "Run", featured speedster Bart Allen as Impulse (played by Kyle Gallner). He is portrayed as a self - centered teenager who uses his powers for personal gain, although by the end of the episode, he was showing signs of changing his ways . Bart also carries around identification of Jay Garrick, Barry Allen and Wally West, the three Flashes in the main DC Universe . After an appearance in the season six episode "Justice", Bart becomes a recurring character using the name Impulse . </Li>

What type of forensic scientist is barry allen