Doppelgänger

A doppelgänger is a person who looks identical to another person. Between Earth One and Earth Two, many people exist on both, meaning there are various doppelgängers.

Behind the scenes

 * Though never seen, Henry Allen, Nora Allen, Oliver Queen, Robert Queen and their respective Earth Two equivalents are presumed to be doppelgängers. Similarly, Shay Lamden and the Earth Two "King Shark" may be doppelgängers, but have only appeared in different mediums (ie. comics and live-action television).