Another obvious parallel between Earth-S and Earth-Four wherein the Fawcett and Charlton characters resided were this pair of goggle-clad gadget-making geniuses. Not intent to rest on their considerable financial success, Alan Armstrong as a Virginian sportsman/weapons-maker and Ted Kord as a robotics scientist, they decided to do more. As Spy Smasher and Blue Beetle, respectively, they attempted to assert some order in a chaotic world. And wearing a brilliant flue and gorgeous green they stood out from the pack. They balanced physical skill with mental acumen like Mister Miracle of Earth-One and Mister Terrific of Earth-Two.
Each knew that they needed an edge, beyond their inherent athletic ability and acrobatic agility. So these two built amazing air/sea crafts unmatched by their peers in the superhero set. Spy Smasher's Gyro-Sub was part-airplane, part-auto gyro, part-submarine/speedboat. While Blue Beetle's Bug was either an air or sea vehicle, it had remarkable auto-pilot programming designed by Kord.
In 1954, aspiring comic book publisher Charlton purchased the rights to several prominent characters from the expiring Fawcett Comics, such as Ibis, Golden Arrow and Lance O'Casey. In 1980 and 1985, DC Comics purchase Fawcett's Marvel Family then Charlton's Action Heroes, and the two were linked once more, now on parallel Earths, Four and Shazam.