The Flash (Barry Allen) is learning more about his powers and what fuels them. The Speed Force that flows gives him his powers, strikes all over Central City.
Four scientist invented time travel in 1967, however one of them suffers a breakdown and the other three exile her fearing she would jeopardize the project.
The Joker rebrand himself as the White Knight of Gotham, the man who will shine a light on all the corruption which is dragging down the city to benefit the few