Next week's episode of The Flash is the second of the Gorilla City 2-parter and will feature the first appearance of another speedster, the Accelerated Man from Earth-19. This is also the home of H.R. Wells and Gypsy. The CW has released a photo of the Accelerated Man and we now know that Sean Poague (Man in the High Castle) will be playing the role.
In the comics Earth-19 is a world ruled by King Edward and is just starting to accept electricity as a thing. The look of the Accelerated Man is straight from the comics, but the character has almost no back story, leaving the TV show free to do just about anything. But we also know, from Gypsy trying to take H.R., that traveling to alternate Earth's is illegal on Earth-19… so why is there speedster on Earth-1?
The Flash airs Tuesdays at 8 PM on the CW.