<P> The fourth season began airing on October 10 , 2017 , and is set to run for 23 episodes on The CW until May 22 , 2018 . </P>
<P> The fourth season began airing on October 10 , 2017 , and is set to run for 23 episodes on The CW until May 22 , 2018 . </P>
when does the flash season four come out
when does the flash season four come out
October 10 , 2017
October 10 , 2017