It's not just the return of Reverse-Flash which should shock fans of The Flash, but the much-anticipated arrival of Killer Frost, when the show's second season returns in the New Year on The CW and Sky1.
In a short, brand new teaser revealed by the American network, a voiceover from none other than Harrison Wells states that Barry Allen isn't the fastest man alive, just before Zoom interrupts a date between Barry and Patty.
Eobard Thawne is also back in Central City, and Caitlin Snow doppelganger Killer Frost makes her big debut.
Fans are also speculating over whether or not the Barry we see interacting tenderly with Iris could be his Earth-2 version, or whether his relationship with Earth-1 Iris is going to go through some major changes.
The Flash returns on Tuesday, January 19 in the US on The CW, following in the UK the week after on Sky1.
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