The Flash season 1, episode 21, “Grodd Lives,” airs tonight, as the S.T.A.R. Labs team faces off against Grodd.

Previously

Barry revealed to the S.T.A.R. Labs team that he has already time traveled, and the team came up with a way to delve into Cisco’s dreams from the alternate timeline. Realizing the best way to get Henry Allen out of prison was to get Wells to confess to murdering Nora Allen, the team set up a trap to recreate Cisco’s confrontation with Wells, only this time with a safety net. However, the trap failed and Wells officially outed himself as the villain. The episode closed with Wells capturing Eddie and revealing his identity to him while Iris realized that Barry is the Flash.

Read our recap for The Flash season 1, episode 20, “The Trap”, here.

Related: The Flash EP teases ‘Barry’s overriding concern,’ Iris learning the truth

Check out the full poster from the Superhero Fight Club video:

Watch a promo

‘The Flash’ season 1, episode 21, ‘Grodd Lives’ synopsis

If that promo has whet your appetite, make sure to read the official synopsis for the 21st episode of the season:

“GRODD RETURNS! — Barry (Grant Gustin) must deal with the Reverse Flash’s (Tom Cavanagh) latest threat to a member of the group. To make matter worse, Dr. Wells unleashes Grodd on the city in order to distract Barry and the team. Joe (Jesse L. Martin), Barry and Cisco (Carlos Valdes) head down into the sewers to catch Grodd but the gorilla quickly gets the upper hand after he kidnaps Joe. Iris (Candice Patton) and Barry have a heart to heart talk. Dermott Downs directed the episode written by Grainne Godfree & Kai Yu Wu (#121).”

Related: The Flash: Who is Gorilla Grodd?

If you need more goodies to tide you over, we have promotional stills from the episode as well:

Watch a clip

Will you watch ‘The Flash’ season 1, episode 21, ‘Grodd Lives’ tonight?