• Grant Gustin plays Barry Allen/The Flash in The CW series "The Flash."

Grant Gustin plays Barry Allen/The Flash in The CW series "The Flash." (Photo : YouTube/The CW Television Network)

One of the things fans want to see in The CW series "The Flash" is to see the three Flashes fight side by side. While it is not happening anytime soon, executive producer Andrew Kreisberg said it is not impossible.

"I guess that could happen down the road," Entertainment Weekly quoted Kreisberg as saying. "I wouldn't want to say no, but so much of that stuff is a little bit further into the future than we've planned for right now."

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Several guest stars will appear in "The Flash" Season 2 episode 13 titled "Welcome to Earth-2." Among them are Violett Beane, Robbie Amell, Teddy Sears and Adam Stafford.

In "The Flash" Season 2 episode 13, Dr. Harrison Wells (Tom Cavanagh) will rescue his daughter Jesse Wells (Beane) from Zoom with the help of Barry Allen (Grant Gustin) and Cisco Ramon (Carlos Valdes). The three are set to journey to Earth-2 to do the rescue.

Jesse Wells will appear in several episodes of "The Flash" Season 2. She is a smart and eccentric college student who is in the middle of a battle between The Flash and Zoom, according to TV Line.

On Earth-2, Barry will be surprised when he runs into Iris West (Candice Patton) and Joe West (Jesse L. Martin) and eventually meets Caitlin Snow/Killer Frost (Danielle Panabaker) and Deathstorm (Amell). On Earth-1, a meta-human nicknamed Geomancer (Stafford) attacks Central City so Jay Garrick (Sears) has to take over the responsibilities of The Flash.

Set to air on The CW on Feb. 9, "The Flash" Season 2 episode 13 is directed by Millicent Shelton. Watch the trailer here: