The Flash has dealt blow after blow to Team Flash in Season 4 thanks to The Thinker as the latest supervillain.
While the cap has already allowed Team Flash to make some strides and save some lives, “Null and Annoyed” revealed that the effects of Harry’s thinking cap could be devastating.
They finally made strides toward beating him at his own game when Harry invented his own version of The Thinker’s thinking cap.
After the events of the latest episode, Harry could be a lot more dangerous.