The flash is that kind of series which makes us fall in love with science. It's totally a science-friction drama which is based on DC comics.
It is so fascinating that you would wanna dig something out of the technical terms used in it.
The story line is so cool and it creates a tension for the next episodes, which makes it hell alot more crazier.
The crossover events in between these series are fun to watch.
1) Arrow
2) The flash
3) Super girl
4) Dc's legends of tomorrow
They all are absolutely brilliant and worth watching.And once you start watching them you can't get over them.
The music and the BGM's are awesome and you'd probably love them.