I know you may think that this might have been part of the filming and story line of the episode but I assure you it was not. In the first fifteen minutes of the episode the black detective walks into a cafe and signals his daughter to step out side to talk while they are walking they pause to stop and if you look in the sky in the back round you can clearly see a round object in the sky move to the right of the screen separate into two then come back together get larger them move quickly off to the left. This was not part of the episode as there is no UFO'S in the flash . I was amazed to have caught this and why the film crew did'ent I have no idea.