The Flash Season 4 – Four Night Crossover Concept Teaser Jun 26, 2017 19:09:40 GMT Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by thefastestmanalive on Jun 26, 2017 19:09:40 GMT Here’s a video teasing possible The Flash season 4 crossover ideas.Check out video at The Flash Episode Guide