It's not clear exactly why Nash Wells (Tom Cavanagh) is looking for particles Eternium. Being near it removes the Powers of Shazam and actual physical contact with it leads to injuries.

The Rock of Eternity, fans may recall, was the lair of the wizard Shazam - yes, the same wizard connected to that Shazam. First appearing in Legion of Super-Heroes (Volume 4) #110 in 1998, Eternium is the name that was given to shards of matter that were cast when the Rock of Eternity was destroyed. That agenda includes looking for items containing something pretty specific - Eternium.īut what is Eternium? For fans of DC Comics it might ring a few bells. He does so in tonight's episode of The Flash, but rather than coming to Central City to be part of Team Flash, this Harrison Wells has his own agenda. Since then there have been many versions of what may just be the smartest man in the Multiverse, though last season's Sherloque has since departed Earth-1 making room for a new version to arrive. It's one of the show's constants beginning with Season 1's 'Harrison Wells' that was really Eobard Thawne in disguise.

Every season of The Flash has a Harrison Wells.

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