Earth-Three was introduced during the Silver Age of Comics as a mirror version of the DC Comics Earth where Americans colonized Europe and actor Abraham Lincoln shot President John Wilkes Booth. An evil version of the Justice League known as the Crime Syndicate of America terrorizes this world. Eventually, a heroic scientist named Alexander Luthor opposes them, donning a high-tech red, yellow and blue "supersuit." During his initial adventure he is aided by the Supermen of Earth-One and Earth-Two, as well as Earth-Three's noble reporter Lois Lane, as they face off against Ultraman, Lex Luthor of Earth-One, and Alexei Luthor of Earth-Two. Later, Alex and Lois marry and have a child, Alexander Luthor Jr., who aids Earth's heroes during the Crisis on Infinite Earths and then opposes them in the crossover Infinite Crisis.