More than once, accounts blithely relate that someone or another built a time machine, yet we seldom are shown or given details about the construction,,and this achievement is notably beyond the greatest geniuses like Reed Richards, Lex Luthor, or Tony Stark. Rip Hunter is in possession of two time ships which he keeps in working order, but we have never been privy to their design or development. Victor von Doom claims to have invented one, but we only ever see the finished product, and the exchange depicted above with Rama-Tut suggests some doubt about its origins. Rumors swirl that Doom made a deal with the Devil, or a devil at least, for the secrets of time travel, but where did Mephsito get them?
Was it the nameless (or more accurately, variously but unofficially identified) Traveler whose account H.G. Wells edited? Or perhaps from it was an outgrowth of the Philadelphia experiment that transport the USS Eldridge through time and space in 1943. Nathaniel Richards (another man later said to have invented a time machine) seems to have been involved in the planning stages of that experiment. If so, he would have been aware—and possible even provided oversight—to the secret project that followed to develop saucer-like time travel craft, based in the Rockies and led by Eldridge survivor Reno Franklin. Franklin’s team definitely developed time craft of a sort, so are they the original source? Or is all time travel technology a causal loop and an example of the bootstrap paradox?