Following last night's "Flash" episode, which you can read a recap of over on Spinoff, the CW has released a trailer teasing next week's big episode. How big is it? It's as big as an 800-pound gorilla.

Longtime Flash foe Gorilla Grodd will make his mark on Central City in next week's episode as Team Flash takes to the sewers to find Harrison Wells and end up running afoul of a massive enemy. We've already seen Grodd in a few cameo appearances on the series and in a few promo photos, but you can see him in action in the promo below.

"The Flash" airs on Tuesdays on the CW.

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). Original airdate 5/5/2015.