Barry Allen (Grant Gustin) is headed for a trip to Gorilla City in search of of Earth-2’s Harrison Wells (Tom Cavanaugh) in the next episode of “The Flash.” Last week, The CW released a batch of photos that included Team Flash behind bars, and the first glimpse of Gorilla City's ruler, Solovar.

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Now the network has unveiled a short behind-the-scenes video on the episode that sets up the two-part storyline's main action piece: a gorilla gladiator fight in an arena full of screaming gorillas! Or, as Cisco (Carlos Valdes) puts it, "Speedster versus super gorilla: best worst video game ever."

However, the most intriguing moment in the featurette finds a caged and de-powered Flash realizing that Wells' body has been hijacked by the amoral great ape, and Solovar's chief rival, Gorilla Grodd.

What has Grodd done to Wells, and will our heroes be able to restore the errant scientist to his own body? The answers undoubtedly lie inside "The Flash's" Gorilla City two-parter.

“Attack on Gorilla City” airs Tuesday, February 21 on The CW. “The Flash” stars Grant Gustin as Barry Allen, Candice Patton as Iris West, Danielle Panabaker as Caitlin Snow, Carlos Valdes as Cisco Ramon, Tom Cavanagh as Dr. Harrison Wells and Jesse L. Martin as Joe West.