The BEST episodes of Codename: Kids Next Door

Every episode of Codename: Kids Next Door ever, ranked from best to worst by thousands of votes from fans of the show. The best episodes of Codename: Kids Next Door!

The objective of Codename: Kids Next Door is simple--to lead young people everywhere in the fight against the injustices of a not-so-kid-friendly world! From the fortress if their treehouse headquarters, this covert team of 10-year-olds uses their patented 2x4 technology to put a stop to anyone who gets in the way of their mission. So hurry and join the KND revolution.

Last Updated: 1/12/2024Network: Cartoon NetworkStatus: Ended
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Operation: M.U.N.C.H.I.E.S.
star
9.40
10 votes

#1 - Operation: M.U.N.C.H.I.E.S.

Season 4 - Episode 14 - Aired 5/13/2005

The KND have run out of Rainbow Munchies, their favorite cereal, so they send out tennis-ball probes to find a box. They find it in Aisle Number 60-teen at the Supervillains Supermarket & Deli, but it is the last one the store has, and it's as popular with the bad guys as it is with the KND!

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Operation: C.A.T.S.
star
9.06
47 votes

#2 - Operation: C.A.T.S.

Season 2 - Episode 1 - Aired 10/3/2003

Numbuh 4 is mistaken for a cat by an old lady after being stuffed in a kitty costume from his dispute with Numbuh 3.

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Operation: G.I.R.L.F.R.I.E.N.D.
star
9.00
10 votes

#3 - Operation: G.I.R.L.F.R.I.E.N.D.

Season 6 - Episode 18 - Aired 11/9/2007

Lizzie has always had to compete with the Kids Next Door for Nigel's attention, and she thinks Nigel has found a new girlfriend.

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Operation: T.R.I.C.Y.C.L.E.
star
8.92
13 votes

#4 - Operation: T.R.I.C.Y.C.L.E.

Season 6 - Episode 11 - Aired 1/19/2007

Tommy loves Numbuh 2's cruddy, old tricycle but gets laughed at when the other kids see him riding it. Using his 2x4 technology expertise, Tommy rebuilds it into the "Best Bike in the Whole World", but the bike turns evil trying to impress Numbuh 2.

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Operation: F.A.S.T.-F.O.O.D.
star
8.75
16 votes

#5 - Operation: F.A.S.T.-F.O.O.D.

Season 2 - Episode 8 - Aired 10/24/2003

Numbuh 3 is sent on a mission for her birthday: to get a fast food meal. The restaurant is later revealed to actually be for sharks, with kids being murdered for food.

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Operation: A.W.A.R.D.S.
star
8.54
13 votes

#6 - Operation: A.W.A.R.D.S.

Season 6 - Episode 3 - Aired 8/2/2006

Sector V attempts to sabotage the Villain's Choice Awards.

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Operation: C.L.U.E.S.
star
8.46
13 votes

#7 - Operation: C.L.U.E.S.

Season 4 - Episode 4 - Aired 11/26/2004

A dinner with Numbuh 2's family turns sour when Numbuh 3's Sigh & Care Rainbow Monkey is found with a fork in it's back, it's up to Hoagie to find this monkey murderer.

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Operation: L.I.C.E.
star
8.41
41 votes

#8 - Operation: L.I.C.E.

Season 1 - Episode 14 - Aired 1/10/2003

The Delightful Children from Down the Lane attack Sector V's headquarters with an infestation of hair-eating lice.

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Operation: S.U.P.P.O.R.T.
star
8.41
17 votes

#9 - Operation: S.U.P.P.O.R.T.

Season 2 - Episode 5 - Aired 10/17/2003

Numbuhs 2 and 1 try to find out about Cree's B.R.A. (Battle Ready Armor).

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Operation: B.U.L.L.I.E.S.
star
8.37
41 votes

#10 - Operation: B.U.L.L.I.E.S.

Season 5 - Episode 4 - Aired 10/21/2005

Numbuh 2 and Numbuh 4 visit Bully Island, a bully habitat owned by Jerry Rassic (an obvious parody of Jurassic Park). Numbuh 2 is interested in the scientific aspect of it, while Numbuh 4 is only in it to see the different types of bullies on the island. After seeing a 'teasing time' (similar to feeding time, but instead kid crash dummies are set on swings and Spitballasaurises come and shot spitballs at them), Numbuh 2 asks Jerry anxiously if he's ever worried about his own safety, being surrounded by bullies all the time. Jerry replies that Bully Island is perfectly safe, and the bullies are in cages that keep them away from him and his sister Eliza, who also lives on the island.

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Operation: A.R.C.H.I.V.E.
star
8.36
14 votes

#11 - Operation: A.R.C.H.I.V.E.

Season 3 - Episode 9 - Aired 7/23/2004

An archive is shown of the origin and story creation of adults, and their rebellion of children. Numbuh 1 narrates on how adults were created, how they took control, and families were made. The story takes its format from the segment The Second Renaissance from The Animatrix.

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Operation: H.A.M.S.T.E.R.
star
8.36
14 votes

#12 - Operation: H.A.M.S.T.E.R.

Season 6 - Episode 5 - Aired 9/22/2006

While the team is off on their recess-rescuing mission, the hamsters are attacked and captured by the Sinister Felines from Atop the Litterbox, but end up battling the Hamsters Next Door.

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Operation: D.O.G.F.I.G.H.T.
star
8.25
12 votes

#13 - Operation: D.O.G.F.I.G.H.T.

Season 2 - Episode 23 - Aired 5/28/2004

Numbuh 2 is shot out of the sky by another pilot countless times, who he thinks is a threat.

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Operation: T.R.I.P.
star
8.18
11 votes

#14 - Operation: T.R.I.P.

Season 2 - Episode 24 - Aired 5/28/2004

Numbuh 3 is followed by the ITFBTM (Interesting Twins from Beneath the Mountain), the cousins of the DCFDTL, when she goes to Japan, so they can infiltrate the Japanese KND headquarters.

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Operation: H.O.T.S.T.U.F.F.
star
8.17
12 votes

#15 - Operation: H.O.T.S.T.U.F.F.

Season 5 - Episode 18 - Aired 7/13/2006

Before the theme starts, Kani tells his eldest daughter, Kuki, not to touch the thermostat even though the house is unbearably cold. After seeing the thermostat's temperature dropping to colder temperature, Kuki decides to touch the thermostat and make things hotter. The next day, the other Sector V agents are gathered for a meeting. Nigel goes jabbering on about cauliflower being rainbow monkey brains. The rest of Sector V doubted this and, while Nigel jabbers on, Kani comes in and tells the agents about Kuki turning up the thermostat. Nigie leaves Wallabee to guard Kani. The rest of Sector V shows up to Kuki's house which is now transformed into an active volcano and ready to explode. Rachel suggests sending Sector P in Pompeii to turn down the thermostat as they have more experience with volcanoes but Numbuh 1 disapproves of this since Kuki is a member of their sector.

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Operation: U.T.O.P.I.A.
star
8.13
15 votes

#16 - Operation: U.T.O.P.I.A.

Season 3 - Episode 4 - Aired 6/25/2004

Numbuh 1 discovers an island paradise populated by kids. Numbuh 1 finds a perfect island, with much candy, fun and no adults. However, he deduces something unusual is happening and has to do with Chester's Happy Headband.

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Operation: P.I.N.K.E.Y.E.
star
8.13
16 votes

#17 - Operation: P.I.N.K.E.Y.E.

Season 3 - Episode 11 - Aired 7/30/2004

Numbuh 2 investigates a pink eye outbreak in Gallagher Elementary in a noir style. An epidemic of conjunctivitis (pink-eye) has taken several victims. Numbuh 2 must investigate if the cases are coincidental or if a certain nurse is causing them.

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Operation: C.R.I.M.E.
star
8.08
13 votes

#18 - Operation: C.R.I.M.E.

Season 6 - Episode 12 - Aired 1/26/2007

When Gallagher Elementary students are being arrested by the School Safety Patrol for crimes they are envisioned to commit, including detective Numbuh 2, it's up to Numbuh 3 to investigate a psychic member of the School Safety Patrol while trying to finish her social studies homework.

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Operation: M.A.C.A.R.R.O.N.I.
star
8.07
14 votes

#19 - Operation: M.A.C.A.R.R.O.N.I.

Season 4 - Episode 6 - Aired 12/3/2004

The KND try to protect the Macaroni Museum of Art from being ransacked, with the worst KND operative ever, Numbuh 13, on their side.

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Operation: P.A.R.T.Y.
star
8.07
14 votes

#20 - Operation: P.A.R.T.Y.

Season 6 - Episode 13 - Aired 1/26/2007

With Father away for the day, The DCFDTL invite Cree and the teenagers to their mansion to plan a new strategy against the Kids Next Door, but instead, the teenagers turn it into a wild house party, leaving the DCFDTL to call Sector V for help.

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Operation: N.A.U.G.H.T.Y.
star
8.07
15 votes

#21 - Operation: N.A.U.G.H.T.Y.

Season 5 - Episode 8 - Aired 12/6/2005

The KND try to save Christmas when the DCFDTL frame them for the theft of a gift-creating contraption called the "REINDEER System" created by Santa.

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Operation: P.O.P.
star
8.05
19 votes

#22 - Operation: P.O.P.

Season 2 - Episode 2 - Aired 10/3/2003

The KND's soda pop is sought out by an evil industrialist. The legal age for drinking soda has been changed to Everyone 13+. Numbuh 2 is caught selling illegal soda at a local bar and discovers a conspiracy to bottle kids.

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Operation: M.A.U.R.I.C.E.
star
8.00
8 votes

#23 - Operation: M.A.U.R.I.C.E.

Season 4 - Episode 18 - Aired 7/8/2005

Maurice, a member of the Kids Next Door is de-commissioned. Numbuh 5 is saddened by it, and suggests that they monitor Maurice to make sure the teenagers do not recruit him.

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Operation: D.A.D.D.Y.
star
8.00
13 votes

#24 - Operation: D.A.D.D.Y.

Season 5 - Episode 15 - Aired 6/12/2006

Numbuh 85 is taken to the KND Hairstyle Headquarters (Sector HH). Numbuh VO5 and his hair doctors try to get his hair back to some form of coolness. It didn't work. Numbuh 1 hides in the room that Numbuhs 83, 84, and 85 are in and informs the trio that the hair doctors were trying to rub dog poop on his head to see if it (his hair) can grow back. Numbuh 1 then notices Numbuh 85's haircut asking "Leaping Lizzies! What did they do to you?!". Numbuh 85 responds that the hair doctors didn't do it, his father did.

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Operation: O.U.T.B.R.E.A.K.
star
8.00
12 votes

#25 - Operation: O.U.T.B.R.E.A.K.

Season 5 - Episode 10 - Aired 1/14/2006

The KND scientists at the Deep-Sea Science Lab capture "Patient C", due to their belief that she has cooties. When Cree lets Patient C out of her containment unit, in Operation: V.I.R.U.S. , as revenge for the KND ruining Cree's date with Numbuh 9, can Sector V recapture the escape without catching "the C.O.O.T.I.E.S."?

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