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"Planet X" is the 8th episode of Season 3 of OK K.O.! Let's Be Heroes and the 100th episode overall.


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






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

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.


Image Gallery

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


Reference Sources

ve Episodes
Pilot Lakewood Plaza Turbo
Shorts KOEnidRadCarolEnid's Bad DayBarrels and CratesRad CriesRad's VanCommercialPower-Up!!!DendyBoxmore InfomercialLet's Do It Together!
Season 1 Let's Be HeroesLet's Be FriendsYou're Everybody's SidekickWe Messed UpJethro's All YoursYou're Level 100!Sibling RivalryI Am DendyYou Get MeYou Are RadJust Be a PebblePresenting Joe CuppaDo You Have Any More in the Back?My Dad Can Beat Up Your DadWe've Got PestsLegends of Mr. GarKnow Your MomWe're CapturedFace Your FearsEverybody Likes Rad?You Have to CarePlaza PromSecond First DateOne Last ScoreT.K.O.Stop Attacking the PlazaWe've Got FleasNo More Pow CardsA Hero's FateLet's Have a StakeoutParents DayWe Got HackedRad Likes RobotsKO's Video ChannelThe Power Is Yours!Glory DaysPlazalympicsBack in Red ActionLet's Take a MomentVillains' Night OutVillains' Night InPlaza ShortsLet's Watch the PilotMystery Science Fair 201XLad & LogicOK Dendy! Let's Be K.O.!RMS & Brandon's First EpisodeLet's Not Be SkeletonsAction NewsThe Perfect MealHope This FliesYou're in Control
Season 2 Seasons ChangeLord Cowboy DarrellPlaza Film FestivalBe a TeamMy Fair CarolLet's Watch the Boxmore ShowYour World is an IllusionThe So-Bad-icalPoint to the PlazaTKO's HouseRed Action to the FutureDendy's PowerSpecial DeliveryWisdom, Strength, and CharismaBittersweet RivalsAre You Ready for Some Megafootball?!Mystery SleepoverFinal ExamsSoda GenieCarolQuestBoxman CrashesMonster PartyCrossover NexusSuper Black FridayPlaza AloneAll in the VillainySidekick ScoutsWhacky JaxxyzProject Ray WayI Am JethroGarQuestGar Trains Punching JudyBeach EpisodeOK A.U.!KO's Health WeekRad's Alien SicknessDark Plaza
Season 3 We Are HeroesKO, Rad, and Enid!TKO Rules!Chip's DamageK.O. vs. FinkThe K.O. TrapWhatever Happened to... Rippy Roo?Planet XDeep Space VacationBig RevealRadical RescueLet's Meet SonicLet's Get ShadowyYou're a Good Friend, KORed Action 3: Grudgement DayCarlDendy's Video ChannelLet's Fight to the EndThank You for Watching the Show
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