OK K.O.! Let's Be Heroes is a superhero comedy animated series created by Ian Jones-Quartey for Cartoon Network. It is based off the original pilot "Lakewood Plaza Turbo", originally released May 21, 2013 for Cartoon Network's 2013 Summer Shorts project. The series was originally believed to be a failed pilot due to its lack of information over the past three years since the pilot's debut, aside from some slight hints and sketches of the cartoon. However, later, the voice actress of KO, Stephanie Nadolny, confirmed that the series is in production; with her having already recorded his voice for five episodes thus far.

On February 4, 2016, a mobile game for Android and iOS was created and the web series had premiered on Cartoon Network's YouTube channel[2] and the CN App.[3]

In 2017, nearly 4 years after the original pilot was released, the show was greenlit[4] and first aired on August 1, 2017.[1]

In December 2017, the second season was confirmed to be released.[5]


While working as a storyboard artist on Steven Universe, Ian came up with an idea for a pitch called "Infinite Guy Generator", where a kid would summon different "guys" every episode to fight the villain's evil guys. When creating the pilot, Ian created a world based on that original idea.

Later, while working as a co-executive producer still on Steven Universe, he used that same idea for a guys generator, that appeared in one episode, which had good reception, caming back later in a second episode of that show.

While developing the OK K.O. mobile game and series, Ian eventually expanded the concept of "guys" to include "gals" and "pals" in this universe. Ian even considered renaming the show "G.U.Y.S. G.A.L.S. and P.A.L.S", but thought it was too long for a title. [6]


Main article: Episode Guide

OK K.O.! Let's Be Heroes sets in the year of 201X, K.O. aims his goal into becoming the greatest hero as he works at Gar's Bodega, a hero supply shop located in Lakewood Plaza Turbo owned by Mr. Gar, a serious, dedicated manager. Alongside K.O. are his best friends and co-workers, Enid, a relaxing responsible ninja and Radicles, a narcissitic alien slacker. K.O. takes on adventures with his best friend and classmate Dendy and battles the plaza against Lord Boxman's robots.

Voice Cast

Main Cast

Major Supporting Cast

Supporting Cast

Captain Planet and the Planeteers Crossover Cast

Former Cast

International releases

Country Title Premiere
Canada OK K.O.! Let's Be Heroes August 1, 2017
Latin America/Brazil OK K.O.! Seamos Héroes (LA)
OK K.O.! Vamos ser Heróis (BR)
September 18, 2017


United Kingdom OK K.O! Let's Be Heroes October 9, 2017


Germany OK K.O.! Neue Helden Braucht Die Welt November 6, 2017


Central and Eastern Europe (CEE) KO OK! Prostě koukej (Czech Republic)
OK K.O.! Legyünk Hõsök! (Hungary)
OK, K.O.! Să Fim Eroi! (Romania)
November 6, 2017
Northern Europe (Nordic) OK K.O. Vi Er Helte! (Denmark)
OK K.O.! La Css Redde Verden (Norway)
OK K.O.! Nu Blir Vi Hjältar (Sweden)
November 6, 2017


Portugal OK K.O.! Let's Be Heroes November 10, 2017
Africa OK K.O.! Let's Be Heroes November 18, 2017


Poland OK K.O.! Po prostu walcz November 2017
Russia and Southeast Europe Окей, Кей О! Будем героями! (Russia)
ОК, Кей О! Да бъдем герои (Bulgaria)
November 2017[12]
The Netherlands OK K.O! Jij Wordt Een Held December 2017
Korea OK K.O! 내일은 히어로 January 1, 2018


Australia OK K.O! Let's Be Heroes January 6, 2018


Phillippines OK K.O! Let's Be Heroes January 6, 2018


South East Asia OK K.O! Let's Be Heroes January 20, 2018


Spain OK K.O! Let's Be Heroes February 5, 2018


Turkey OK K.O! Kahraman Olalım February 5, 2018


Japan OK KO! 英雄にしよう July 2018[19]


  • One of the most well known qualities about this cartoon is its protagonist, K.O., who is voiced by Stephanie Nadolny; an actor better known for her role as Kid/Preteen Goku, and Kid/Preteen Gohan from the Dragon Ball (1986-1989) and Dragon Ball Z (1989-1996) TV series.
    • In the pilot, she even references the anime with her new character's traits. Such as:
      • Being really enthusiastic, kindhearted and wholeheartedly righteous.
      • Always wanting to pick a fight to test his powers.
      • Screams at an incremental rate as he charges up an attack.
  • The show is often compared to the anime My Hero Academia as they are both superhero adventure series about a hero-in-training.
  • According to Ian Jones-Quartey, it takes the storyboarders to draw and write for 5 weeks and revisions department to add details and extra animation for 3 weeks after. [20]
  • In the Steven Universe episode, "Future Boy Zoltron", an arcade machine references the show's name.
Steven Universe Hidden OK KO game