Question: What is the release date for flash season 4?
Disambiguated questions and answers: question: What is the release date for the network release of Flash season 4?
What is the release date for the Flash season 4 on Blue Ray?
What is the release date for the  Flash season 4 on Netflix?
answer: October 10, 2017
August 28, 2018
Late May 2018
Natural Questions answer: January 8 , 2017 (from the Wikipedia article "List of The Flash episodes")