Earlier this month during the CW's presentation at the TCA press tour, it was revealed that "The Flash" had a Gorilla City two-parter in its future. Now, a few weeks later, the first synopsis for the two-parter has arrived -- and it features an unlikely team-up.

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The episode, "Attack on Gorilla City," airs on February 21 and features the team taking a trip to Earth-2 on a rescue mission. Upon arrival, they run afoul of one of their deadliest foes, Gorilla Grodd, and potentially strike up a complicated partnership.

When Jesse Quick (guest star Violett Beane) informs the team that her father (Tom Cavanagh) has been abducted, Barry (Grant Gustin), Caitlin (Danielle Panabaker), Cisco (Carlos Valdes) and Julian (Tom Felton) voyage to Earth-2 on a rescue mission to save Harry from Gorilla City. As they trek through the forest, Barry and the team are immediately captured and brought to Grodd (voiced by David Sobolov). Grodd tells them he needs their help to stop Solovar (voiced by Keith David), the leader of Gorilla City, as Solovar wants to invade Earth-1. Meanwhile, back on Earth-1, Jesse and Kid Flash (Keiynan Lonsdale) hit the streets to stop a metahuman that can control gravity, with H.R. and Joe (Jesse L. Martin) guiding them from S.T.A.R. Labs.

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Gorilla Grodd was sent to Earth-2 last season in the episode "Gorilla Warfare," which aired in November 2015. The end of that episode also introduced Gorilla City in to the "Flash's" TV mythos, as Grodd was transported to the city. The synopsis confirms that the CW's version of Solovar will be similar to the comic book version -- and they'll have a similar rivalry. In the comics, Solovar -- a psychic gorilla like Grodd -- is the leader of Gorilla City. Under his rule, Gorilla City became a technological wonder. Solovar’s involvement in “The Flash’s” Grodd/Gorilla City two-parter makes sense considering that Solovar is Grodd’s main rival (other than the Scarlet Speedster) in the comics.

"Attack on Gorilla City" airs on February 21, after a weeklong hiatus following next week's episode titled "Untouchable."

Starring Grant Gustin as the Scarlet Speedster, "The Flash" airs Tuesdays at 8 pm ET/PT on The CW. The series also stars Jesse L. Martin, Tom Cavanagh, Carlos Valdes, Candice Patton, Danielle Panabaker, Keiynan Lonsdale and more.