The episode aired a total of 54 episodes, originally 52 episodes due to two season 2 episodes being aired in season 1's rotation. Season 1 originally ran from August 1, 2017 to April 6, 2018, with a winter hiatus between November 17, 2017 and February 19, 2018. There are two DVDs for Season 1, OK K.O.! Let's Be Heroes: T.K.O. (V1) and the Australian Season 1 set.
The season premiered on August 1, 2017, with four episodes, "Let's Be Heroes", "Let's Be Friends", "You're Everybody's Sidekick" and "We Messed Up." Alongside with "Jethro's All Yours" and "You're Level 100!", the episodes aired through the Cartoon Network app on June 13, 2017, close to two months before the broadcast airing. The first 22 episodes aired in August during week-long bombs, which started on August 1 and ended on August 24, 2017. New episodes only aired on four days of the week, which was usually from Monday-Thursday at 6:30pm (with the exception of the first week, which had new episodes from Tuesday-Friday). Beginning of September 1, 2017, new episodes began airing on Fridays at 6:30pm. Beginning on February 19, 2018, new episodes were moved to airing on Mondays at 6:30pm. The season finale aired on Friday, April 6, 2018.
Volume 1:K.O.’s journey starts with a job at Gar’s Bodega – the best place for heroes to train! With the help of his friends Enid and Rad, K.O. must defend Gar’s from Lord Boxman’s evil robots...and make sure the floors are super clean. He’s got to navigate the mysterious back room, help the customers, and prove he can be the greatest hero ever!
Volume 2: K.O.’s on his way to becoming a great hero at Gar’s Bodega – he helps the customers achieve their dreams, helps his co-workers face their fears, and helps to defend the plaza from the evil Lord Box-man! And find out if he can unlock an amazing new power in a half-hour special episode! Everything’s coming up K.O.!
"K.O.'s Inner Monologue": KO’s inner monologue tells us how even a mundane everyday activity is another step in his journey to being a great hero.
"Action News": Butt-kicking Dynamite Watkins from News 52’s Action News Team reports on an exciting day at Gar’s.
"Life of Darrell": Lord Boxman explains where all the robots that constantly attack the Plaza come from.
"Where in the World is Mr. Gar?": KO, Rad, and Enid try to figure out the mysterious adventure Mr. Gar keeps holo-phoning from.
"Enid vs. Rad": Enid and Rad both think the other one has it easy, and they switch jobs to prove it.
This season features the series' first crossover, a crossover with Captain Planet and the Planeteers. It was first announced September 14, 2017 on the Cartoon Network PR Twitter. It premiered on October 9, 2017 (Same day as the UK premiere of season 1).