Taking numbers instead of names, five extraordinary 10-year-olds form a covert team called the Kids Next Door with one dedicated mission: to free all children from the tyrannical rule of adults.
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see all options Availability data: JustWatch
- Seasons
- 6
- Episodes aired
- 139
- Latest aired
- S06E21
- Total runtime
- 1d 4h
Timeline when each season aired
- Season 1 December 2002 – March 2003 26 episodes
- Season 2 October 2003 – June 2004 25 episodes
- Season 3 June 2004 – November 2004 23 episodes
- Season 4 November 2004 – July 2005 22 episodes
- Season 5 September 2005 – August 2006 22 episodes
- Season 6 August 2006 – November 2007 21 episodes
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S04E01 Operation R.A.B.B.I.T.
November 19 · 11min find the promo
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Numbuhs 2 and 5 must rescue the first grade class's pet rabbit before it is turned into a chocolate bunny by Heinrich Von Marzipan.
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S04E02 Operation: FLUSH
November 19 · 11min find the promo
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The villains attempt to capture the KND Treehouse, but the Toilenator, trying to be helpful, only hinders their plans.
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S04E03 Operation F.O.O.D.F.I.T.E.
November 26 · 11min find the promo
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The KND are dismayed to discover that Grandma Stuffum is the new cafeteria lunch lady and she's got some pretty nasty recipes to foist on her pint-sized nemeses.
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S04E04 Operation: C.L.U.E.S.
November 26 · 11min find the promo
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A dinner get-together between Numbuh 2 and Numbuh 3's respective families turns sour when Numbuh 3's Posh Party Rainbow Monkey doll is badly damaged with a fork in its back. Now it's up to Numbuh 2 to figure out the murderer of the doll.
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S04E05 Operation N.U.G.G.E.T.
December 3 · 11min find the promo
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Numbuh 4 discovers a chicken nugget that initiates a chicken nugget rush.
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S04E06 Operation: M.A.C.A.R.R.O.N.I.
December 3 · 11min find the promo
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The Kids Next Door have the misfortune of swapping the Toilenator to Mr. Boss with the unlucky Numbuh 13, who informs the operatives of the adult villains' plans for a macaroni dinner by ransacking a museum of macaroni art.
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S04E07 Operation P.O.O.L.
December 10 · 22min find the promo
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Numbuh 4's newly-installed backyard pool is the portal into an alternate dimension where everything is the opposite of everything in the real world.
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S04E08 Operation C.A.K.E.D.-F.O.U.R.
February 21 · 22min find the promo
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The Delightful Children From Down the Lane decide to give their birthday cake to the winner of the annual Tubathon race and everyone is eager to go for it. No one is more eager than Numbuh 2, who plans to use his old tube, Betsy, and "farfegtubing". But are the Delightfuls keeping their word about the cake or are they luring the competitors into a trap?
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S04E09 Operation S.I.T.T.E.R.
April 29 · 11min find the promo
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The brothers Gilligan have gotten a new babysitter: the villainous Cree Lincoln! For Numbuh 2, this will either be a dream come true or a nightmare.
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S04E10 Operation: S.A.T.U.R.N.
April 29 · 11min find the promo
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Everyone's collections of Rainbow Monkey toys are mysteriously vanishing. The KND investigate and discover the toys revolving around the planet Saturn as its big ring!
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S04E11 Operation: C.H.O.C.O.L.A.T.E.
May 6 · 11min find the promo
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Numbuh 5 goes to the planet Mars to pick up some marshmallows as part of dessert with her family after dinner. But upon her return, she discovers her family and friends are being menaced by an old foe who now is a mere shell of his old self.
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S04E12 Operation: M.A.T.A.D.O.R.
May 6 · 11min find the promo
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Numbuh 4 is forced to choose between helping the KND battle the villainous Soccer Mom or engaging at his new gig as a matador in the Bully Fights.
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S04E13 Operation L.U.N.C.H.
May 13 · 11min find the promo
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Lizzie had made a romantic lunch for both her and "Nigie", but it gets stolen by Robin Food and his Hungry Men, who rob from the young and give to the old.
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S04E14 Operation: M.U.N.C.H.I.E.S.
May 13 · 11min find the promo
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The KND discover that they're out of Rainbow Munchies cereal, so they try to go to a grocery store to get some more. But the only grocery store that sells such a product is the villains-only store called the Super-Villains Supermarket & Deli.
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S04E15 Operation K.N.O.T.
May 20 · 11min find the promo
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Numbuh 1, both literally and figuratively, risks his neck when he sides with an adult to rid children of snake-like ties.
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S04E16 Operation: C.L.O.S.E.T.
May 20 · 11min find the promo
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A boy gets lost in a closet and the KND are on the job in no time.
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S04E17 Operation S.N.O.W.I.N.G.
May 27 · 22min find the promo
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Numbuh 1 is sick in bed with a cold on a snow day. Even worse, the villainous Fourth Grade President is determined to bring the children, who are all taking advantage of the snow day, to school for a special assembly.
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S04E18 Operation M.A.U.R.I.C.E.
July 8 · 22min find the promo
Show synopsis
An operate named Maurice is decommissioned from the Kids Next Door after he attains the age of 13. He has been working on a cure for chicken pox. The one who is saddened the most by his departure is Numbuh 5, so she suggests that they keep an eye on him so that the teenagers don't recruit him.
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S04E19 Operation L.O.V.E.
July 15 · 11min find the promo
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Numbuh 3 stars as the lead female in a "West Side Story"-style romantic musical. But when Numbuh 4 interrupts the play, the war that follows between the Kids Next Door and the Delightful Children From Down the Lane is anything but staged.
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S04E20 Operation: C.O.U.C.H.
July 15 · 11min find the promo
Show synopsis
Numbuhs 1, 2 and 5 all go off to China after Numbuh 4 falsely alerts them of trouble there. He then watches TV in their absence, but Numbuh 3 doesn't leave, either, and they fight over the remote control, which falls into the couch. Numbuh 4 goes into the couch after it... and winds up a strange world where everyone is named Dave, who want the control for themselves.
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S04E21 Operation D.O.D.G.E.B.A.L.L.
July 22 · 11min find the promo
Show synopsis
The powerful Dodgeball Wizard believes that adults are better at playing dodgeball than kids, so when he learns of "the one called Beetles," a kid who is a greater dodgeball player than he is, he becomes determined to destroy his rival. And that rival is, apparently, Numbuh 4!
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S04E22 Operation: F.E.R.A.L.
July 22 · 11min find the promo
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Numbuh 1 is sent to retrieve an important code from Rainbow Monkey Island, but after a run-in with the Delightful Children From Down the Lane, he is left stranded there. Soon, he ends up forgetting who he is and starts behaving like a wild Rainbow Monkey. His teammates become very worried when it appears that there may be no way to cure him.