The flash is the best science fiction show , I have ever seen.Actually flash is also one of the hero of marvels and as u see the flash in justice league , u can think about his powers. In the season The flash , barrey allen becomes flash ( the fastest man alive) after struck by lightening from the arc reactor . But due to this lightening some other people also get supernatural powers , and among them some are evil. So to fight this The flash and his team continously team up in star lab.
And the main joy comes when people from other earths ( other times) come to compete The flash .