The fourth season began airing on October 10, 2017, and is set to run for 23 episodes on The CW until May 22, 2018.\n\nAnswer this question: when does the flash season four come out? Let's have some stream of consciousness first.
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The important part for answering this question is: The fourth season began airing on October 10, 2017, and is set to run for 23 episodes on The CW until May 22, 2018. So, the answer is October 10 , 2017.
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