 
 <translate> The relevant information is: The fourth season began airing on October 10, 2017, on The CW. So the final answer is October 10 , 2017. <hau> Bayanin da ya dace shine: Lokacin na huɗu ya fara watsawa a ranar 10 ga Oktoba, 2017, a kan The CW. Don haka amsar karshe ita ce 10 ga Oktoba, 2017. 