The Flash runs so fast that he not only jumps between worlds but also networks, arriving in National City (and CBS), just in time to help Supergirl shine.
This week's episode of Supergirl addresses one of today's most pressing issues and allows aliens and superheroes to take on metaphorical, and moral, significance.
"Do not get distracted," the Flash from Earth-2 instructs the Flash from Earth-1. But of course, getting distracted is precisely what The Flash wants us to do.