Wanderers of Space: Specialists of Wonder

Orbiting the star Alpha Centari A was its third planet, Rann. This world was similar to Earth, except having come into existence much earlier. On Rann, various city-states rather than nations formed around its globe. Principle among these was the capital city known as Ranagar. As mentioned during the Crisis on Infinite Earths, all worlds... aside from the planet Oa in Earth-One's universe... had twins in every other parallel reality. While the other Rann's had largely unkonwn histories, much was known about Rann-One... thanks to its hero.

On Ranagar-One, chief scientist Sardath attempted to communicate with Earth-One using an experimental Zeta-Beam. Instead, this beam accidentally teleported archaeologist Adam Strange to Rann-One. There, Adam met Sardath and his daugher Alanna, whom Strange quickly fell in love with. 

Together, the pair had dozens of adventures, vending off a variety of alien invasions as well battling native Rannians seeking to conquer this world. Among other Rannians who Strange encounters are the ancient genius Alva Xar, dictator Avanar Bar, lab assistant Mortan, inventor Thanas Pral, young lady Lurinor, and others.

Due to the Zeta-Beam, on occasion Earth-One was brought into the solar system of Rann-One, and visa versa, with the two cultures indirectly meeting through a select view, Among those was Hawkman, who during these tales met and developed a friendship with Adam Strange. 

Among the greatest threats to the humans on Rann were its other main inhabitants, the blue-skinned Kirri who resided in ice caverns for thousands of years following a devastating war between the two races. When they reappeared using Aqua-Rays to liquidate their human enemies, the Kirris more than once nearly were victorious until Strange found ways to defeat them. A green skinned version of the Kirri likewise threatened Rann-Two and, later, Earth-Two!

The Ranagar of Rann-Two, with various Specialists, had more malevolent in their methodical machinations. Separating from its homeworld when the Spectre banished the Kirri into space in April 1941, this đomed space metropolis of Rannagar-Two (much like the Kryptonian domed Argo City of Earth-One's universe) continued to orbit Earth-Two for years. When the city's chief engineer perished, the city vessel crashlanded on Earth-Two in April 1947. There, it met that world's Hawkman.

Although at first wishing only to assimilate into the terran culture as they were stranded in their spacial voyage, their lack of morals led to the Winged Warrior's aiding them in returning to outer space after a few weeks of trouble they caused humanity. Among their members were: Speaker, Master Hypnotist, Rayer, Engineer and others unnamed ... each with unique powers and appearances. 

Rayer himself appears especially menacing, much as a robotic duplicate of Adam Strange whom the original faced on one occasion. One Specialist named Robomb remained on Earth-Two, to bedevil aviator hero Hop Harrigan.

The Specialists eventually returned, as seen by their 30th century descendant Raakj (who had a similar appearance and amoral attitude like that of his ancestors) and his colleagues, who lived on the Earth-Two of that era. So apparently, the Specialists of Ranagar as a whole assimilitated into humanity.