Charlton Comics’ Other Action Heroes

On the parallel planet of Earth-Four, a terrific trio of troubleshooters appeared on occasion alongside Blue Beetle and Peacemaker. While this quintet never had a name, they may have been a precursor for the future Sentinels of Justice, of which Blue Beetle would be a future member. The original Sentinels consisted of another tremendous trio bequeathed with specialized garments which granted them amazing abilities. As to the origin of the superpowers on display by today's trio, whether these traits were inherent or augmented by sophisticated devices, is unknown.

When the aspiring young  inventor Jack Biceps adopted to alter ego of a supervillain named  Sinestro the Boy Fiend, he attempted to make a name for himself as protector for all criminals. Biceps was opposed by the two established action heroes, as well as newcomers Captain USA, Green Spider and Superguy. While never having appeared before, these three were apparently well known by their adversary, thus establishing their notoriety among the more publishized contemporareous costumed crusaders.

Captain USA had cosmic twins on Earth-One/Earth-Two who were  geologists/oil magnates Pete Ross and Tex Thompson. This pair were amateur adventurers, inspired by  Superboy and Superman, and for a time wore caped costumes as superheroes.

Pete of Earth-One and Tex of Earth-Two assumed the alter egos of the second Superboy and Mister America, respectively. While Captain USA seemingly had natural superhuman strength and the power of flight, Pete and Tex used their technological prowess to artificially replicate the abilities of the Supermen.

Superguy’s Earth-One/Earth-Two doppelgängers were Kara Zor-El/Linda Lee Danvers and Kara Zor-L/Karen Starr. These two heroines also known as Supergirl and Power Girl were the first cousins and secret weapons of their Earths’ Supermen during the same period of time, until they latter gained public notoriety. Superguy likewise was less well known than the Superman of Earth-Four, Captain Atom, of whom there was no known familial connection. 

Green Spider’s counterparts were the rogue vigilantes Black Spider and the Spider, dark reflections of the more noble Batmen. While those heroes operated in the Gotham Cities of Earth-One and Two, Green Spider’s base of operations was in Earth-Four’s Gothamville.

Although nothing is known as to their personal origins nor their civliian identites, each man possessed superpowers. Whether they had innate abilities or were technically enhanced, they appeared to be barely sufficient at holding this own versus an amateur antagonistic, his world's version of the twin Earth Flash’s’ foes Trickster and Gadgeteer.

The Boy Fiend was able to evade this quintet, a loss which Peacemaker and Blue Beetle recovered from but which this trio of amateur costumed crusaders apparently did not.  This is evident in the short term nature of Green Spider, Captain USA and Superguy's heroic histories.