Major Flash villain will return in DC TV crossover

Ben Lee
Photo credit: The CW

From Digital Spy

Warning: This article contains spoilers for The Flash season 4.

Flash fans, be prepared – as a familiar villain appears to be heading back to your screens.

It seems the DC TV universe is pulling out all the stops for its next big crossover, if this behind-the-scenes picture tells us anything.

Related: The Flash season 4 – everything you need to know

That's right: Tom Cavanagh is back, wearing the Reverse-Flash costume.

It's still unclear which iteration of Reverse-Flash he's playing – whether he is a time-displaced version, from another reality, or something entirely different.

Dr Harrison Wells, the person behind the S.T.A.R. Labs Particle Accelerator in Central City, was a main character in season one but later revealed himself to be Eobard Thawne (Matt Letscher) / Reverse-Flash in disguise, with the real Harrison dead.

Photo credit: Twitter

Cavanagh has continued to appear on the show as different doppelgangers of the character – including Harry Wells (from Earth-2) as well as season three's HR Wells (from Earth-19).

A theory is going around that Cavanagh is playing the Earth-X version of The Flash.

Earth-X is a parallel world where the Nazis won World War II.

Executive producer Andrew Kreisberg previously promised that Harry "won't be the only Wells we'll see" this season, while Cavanagh himself revealed: "We're going to start with Harry and then find a way, I think, to try and get a different version of Wells in there."

The Flash airs on The CW in the US and on Sky One in the UK.

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