By Natalie Abrams
Updated March 17, 2015 at 08:55 PM EDT
Credit: Diyah Pera/CW

The phrase “game changer” gets thrown around pretty often on television. It’s meant to convey that the show you thought you were watching is about to be upended by some crazy development. In the case of Tuesday’s episode of The Flash, using “game changer” is an understatement.

“With no disrespect to any of the other directors or episodes that we’ve produced, I think this is the best episode that we’ve done,” executive producer Andrew Kreisberg says. “Everything that The Flash can do—I don’t mean Barry Allen as a hero—but as a TV show, I feel like this episode delivers in spades. It’s got amazing visual effects that you just don’t see on television. It’s full of heart, full of romance, full of genuine scares and it’s really like the best version of this show.”

During the hour, the Weather Wizard (Liam McIntyre) returns to get vengeance on Joe (Jesse L. Martin) for killing his brother, ultimately setting his sights on Barry (Grant Gustin) and Iris (Candice Patton). Meanwhile, Cisco (Carlos Valdes) senses something is amiss with Dr. Wells (Tom Cavanagh) and sets out to investigate the night the Reverse Flash broke into S.T.A.R. Labs. Check out a sneak peek from the episode below:

The Flash airs Tuesdays at 8 p.m. ET on The CW.

Episode Recaps

We Are The Flash

The Flash

After the success of Arrow, Barry Allen (a.k.a. The Flash) gets his own CW treatment in this comic-themed spin-off.

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