Captain Atom is an Australian comic book series created and written by Jack Bellew with illustrations by Arthur Mather.

[7][8] The character's origin had identical twin brothers being caught in an atomic bomb blast and becoming fused into one, with Dr. Bikini Rador (a nuclear physicist) being the dominant persona.

Rador takes on the identity of Larry Lockhart, an FBI agent, to fight crime, switching places with his brother when situations call for a superhero.

[3][16] Early issues featured backup stories provided by Mather (Dopey Dan), Stan Pitt (Jim Atlas, Dr Peril of Igogo) and Michael Trueman (Crackajack – Daredevil Trapeze Star).

In the origin story of Dr Manhattan (who is based on the Charlton Comics Captain Atom), the character is shown rejecting a helmet, which is part of his US Government-supplied costume.