Brigadier Atom was married to Eve of Shadows. When his wife was forcefully recruited by Monarch and returned to her home dimension, she found Monarch having defeated Brigadier Atom and grasping him by the throat. After Monarch destroys Earth-13's North America with a massive atomic blast, Brigadier Atom appears to be the only survivor. He was then later recruited by Breach as part of the Captain Atom Brigade against Monarch. Brigadier Atom was killed by Monarch by being ripped in half.