Emil Hamilton (Earth-1955)

"Don't go away son-- I need you! Family don't leave each other! If you go away, I'll be all alone... I don't want to be alone... I don't want to be alone."

- - Professor Emil Hamilton to Doomsday

Professor Emil Hamilton, formerly known as the costumed criminal Thinkerer, is a scientist who was recruited by Maria Hill to work for Cadmus as a weapons designer and the cloning of Superman and Supergirl in the form of Doomsday and Power Girl.