• Tom Cavanagh and Grant Gustin attend the 'The Flash' Special Video Presentation and Q&A during Comic-Con International 2016 at San Diego Convention Center on July 23, 2016 in San Diego, California.

Tom Cavanagh and Grant Gustin attend the 'The Flash' Special Video Presentation and Q&A during Comic-Con International 2016 at San Diego Convention Center on July 23, 2016 in San Diego, California. (Photo : Getty Images/Matt Winkelmeyer)

"The Flash" Season 3 episode 13 will see the return of a supervillain, Grodd. The upcoming episode is titled "Attack on Gorilla City" and it will see Barry and Team Flash visit Gorilla City. Here are a few spoilers for the next chapter of the series. Read on to find out what happens next.

[Spoiler alert! This article contains spoilers for "The Flash" Season 3 episode 13 "Attack on Gorilla City." Do not read further if you don't wish to know more about it.]

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"The Flash" Season 3 episode 13 will see Barry come face to face with his enemy Grodd. According to the description of "Attack on Gorilla City" on Spoiler TV, Grodd will approach Barry for help.

Spoilers reveal that Jesse will travel from Earth-2 to Earth-1 to inform that her father Harry has been kidnapped on Earth-2. Team Flash including Barry, Caitlin, Cisco and Julian head to Earth-2 Gorilla City to save Harry.

Things takes an unexpected turn when Barry and the team are abducted by Grodd's team while they are trekking through the forest in search for Barry. This time, however, Grodd needs Barry's help. He asks for Team Flash's help in order to stop Solovar, the leader of Gorillas in Gorilla City and Grodd's enemy. He informs Barry that he is planning to invade Earth-1 and take over it.

At the Television Critics Association press tour, "The Flash" executive producer Andrew Kreisberg revealed that Grodd will appear in two episodes.

"One of the [episodes] will take place in Gorilla City and one of them will take place on Earth-1," Kreisberg said as quoted by Entertainment Weekly.

In addition, On Earth-1, Jesse and Kid Flash get into action to stop a metahuman creating chaos in Central City with his power to manipulate gravity. H.R. and Joe guide the duo the deal with the problem.

A promo for "The Flash" Season 3 episode 13 "Attack on Gorilla City" is highly anticipated and it is expected to be revealed after the broadcast of episode 12 airing on Feb. 7. Stay tuned, it will be updated here.

UPDATE

 A promo video for "The Flash" Season 3 episode 13 is out. Scroll down to watch it.