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This article is about the episode. You may be looking for the planet.

"Planet X" is the 9th episode of Season 3 of OK K.O.! Let's Be Heroes and the 101st episode overall.


When Rad returns to his home planet, he learns a shocking truth about alien society.[1]






  • Bill Otomo is a guest character and prop designer for this episode.

Production Notes

  • The animation for the episode, particularity the video game scene is animated by Le Cube, an animation studio from Buenos Aires and São Paulo, Argentina.[2]


  • This is the second on-screen vacation Rad's family took as their first on-screen vacation was from "Seasons Change". Ofrang makes a remake that he hopes that Rad does not get overwhelmed like how he was from the previous vacation.

Cultural References

  • The surface of the planet is based on the planet of the same name in the Warner Bros. cartoon "Duck Dodgers in the 24th & 1/2 Century."
  • The song that plays when Radicles meets the nerds sounds similar to the "Lambda Rap" from the movie Revenge of the Nerds.
    • A subject of this episode is also the ongoing war between "nerd" and "jock" factions, just like the aforementioned movie and its sequels.
  • One of the nerds' eyebrows, which is shaped like an curvy M, may be a reference to the final storyline of Dragon Ball, wherein those controlled by a powerful sorcerer had the mark of an "M" on their foreheads.
    • The nerd, himself, has a hairline not unlike the Dragon Ball character of Vegeta, one of the notable characters influenced during that storyline.
  • Another possible Dragon Ball reference happens when Rad and Coach shake hands. The power of their "Shake Quake" moves causes small rocks to float, then ultimately explodes, leaving an impact crater on the area around them – a common occurrence in Dragon Ball fights.



Click to view the gallery for
Planet X (episode).


View the episode's transcript here.

References List

Pilot Lakewood Plaza Turbo
Shorts KOEnidRadCarolEnid's Bad DayBarrels and CratesRad CriesRad's VanCommercialPower-Up!!!DendyBoxmore InfomercialLet's Do It Together!
Season 1 A: Let's Be HeroesLet's Be FriendsYou're Everybody's SidekickWe Messed UpJethro's All YoursYou're Level 100!I Am DendyPlaza ShortsSibling RivalryYou Get MeDo You Have Any More in the Back?Just Be a PebblePresenting Joe CuppaMy Dad Can Beat Up Your DadWe've Got PestsYou Are RadLegends of Mr. GarWe Got HackedPlazalympicsWe're CapturedKnow Your MomFace Your FearsEverybody Likes Rad?You Have to CarePlaza PromT.K.O.

B: Stop Attacking the PlazaWe've Got FleasOne Last ScoreSecond First DateNo More Pow CardsLet's Watch the PilotA Hero's FateGlory DaysParents DayLet's Have a StakeoutThe Power Is Yours!Rad Likes RobotsKO's Video ChannelVillains' Night OutVillains' Night InBack in Red ActionOK Dendy! Let's Be K.O.!Let's Take a MomentRMS & Brandon's First EpisodeMystery Science Fair 201XLet's Not Be SkeletonsLad & LogicAction NewsYou're in Control

Season 2 A: Seasons ChangeLord Cowboy DarrellHope This FliesThe Perfect MealPlaza Film FestivalBe a TeamMy Fair CarolPoint to the PlazaThe So-Bad-icalLet's Watch the Boxmore ShowYour World is an IllusionRed Action to the FutureTKO's HouseSpecial DeliveryDendy's PowerWisdom, Strength, and CharismaBittersweet RivalsAre You Ready for Some Megafootball?!Mystery SleepoverFinal Exams

B: Soda GenieCarolQuestBoxman CrashesCrossover NexusPlaza AloneAll in the VillainyMonster PartyGarQuestSuper Black FridayWhacky JaxxyzSidekick ScoutsProject Ray WayI Am JethroBeach EpisodeRad's Alien SicknessKO's Health WeekGar Trains Punching JudyOK A.U.!Dark Plaza

Season 3 We Are HeroesKO, Rad, and Enid!Let's Meet SonicTKO Rules!K.O. vs. FinkChip's DamageThe K.O. TrapWhatever Happened to... Rippy Roo?Planet XDeep Space VacationBig RevealRadical RescueYou're a Good Friend, KOLet's Get ShadowyRed Action 3: Grudgement DayCarlDendy's Video ChannelLet's Fight to the EndThank You for Watching the Show