Arrowverse the flash

 The Flash is an American TV series, a modern re-imagining of the DC Comics superhero, The Flash. The series premiered on October 7, 2014, airing at 8 pm. Grant Gustin portrays Barry Allen/The Flash in the eponymous lead role.

Originally, the twentieth episode of Arrow's second season, "Seeing Red", was going to act as a backdoor pilot and if it was popular enough the series would be green-lit.[3] However, after executives from The CW saw "The Scientist" and "Three Ghosts", Barry's premiere episodes on Arrow, they made the call to order the series straight to pilot.[4] On May 8, 2014, The Flash was picked up to series.[5] On October 21, 2014, The Flash was green-lighted for a full season by the CW, extending from 13 episodes to 23.[6]