The flash is a sci-fi character from DC multiverse rival of Marvel multiverse. The flash became popular from animated justice league series which used to air way back, they also have lots of comics and flash is one of the main character in justice league. Recently they also released Justice league movie( Real life i.e. non animated) which wasn’t really that good. Ok so now the flash tv series which is airs on The CW network. Season 4 is currently airing. This tv series is basically based on life of sci-fi character the flash a.k.a barry allen. The plot is good. The flash get his power when he is struck by lightning and becomes the fastest man alive. Ofcourse there are friends and enemies of him. He has a team at star labs which is located in central city. And he has a long lasting enemy called the reverse flash. Barry allen other than being a speedster he is also a forensic scientist in police force of central city. The plot includes lots of meta-humans ( the people who have superpowers) . They do crossovers in each and every season near the mid finale with other DC multiverse characters like arrow, supergirl, legends of tommorrow. We might even see Batman in next upcoming season because batman is in the making but unfortunately the batman tv series Gotham does not air on CW. Hope for the best for next upcoming season. Overall the TV series is one of the most liked tv series amongst youngsters and it is pretty good.