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Old September 4 2013, 02:41 AM   #8
Greg Cox
Vice Admiral
Location: Oxford, PA
Re: Was TOS the first show to use the term 'parallel universe'?

plynch wrote: View Post
In the DC comics, they had Earth-1, Earth-2, Earth-S idea going before Trek.
Good call.

More specifically, DC had been milking the "parallel worlds" thing since "Flash of Two Worlds," which first appeared in September 1961.
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