Complex sentence: Tom Emery hadn't amounted to much in his life, until a nosy reporter connected him to the identity of Dr. Spectro, a part of the "big lie" of Captain Atom's super-heroic life.
Split into simpler sentences: Tom Emery hadn't amounted to much in his life. Until a nosy reporter connected him to the identity of Dr. Spectro, a part of the "big lie" of Captain Atom's super-heroic life.