The flash returns with new threat named Zavitar “the god of speed”.As Barry aka The Flash speeds around central city with his new brother,Walle west aka kid flash.These to are trying to change the time line to prevent there sister iris west,wich is part of team flash as Cisco Ramos better known as Vibe sends Barry to the future to see how iris gets murdered by zavitar.Once they come back wall and Barry are now trying to prevent iris’s death.Ending the episode with a new member in team flash named Julian aka Dr.Alckamy with was a villain during the first half of season 3 but he joined the team because they knew he was being controlled by zavitar.