During the 12-issue limited series Crisis on Infinite Earths, Luthor allies himself with fellow Superman foe Brainiac to recruit an army of supervillains spanning the DC Multiverse. Alexei Luthor is present and complains this army does not need two Luthors; Brainiac kills Alexei in response. At the conclusion of the series, reality is altered so that each of the different universes converge into one. Luthor is subsequently returned to prison with all his memories of the Crisis forgotten.