The WORST episodes of Codename: Kids Next Door

Every episode of Codename: Kids Next Door ever, ranked from worst to best by thousands of votes from fans of the show. The worst 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 of 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: 6/10/2025Network: Cartoon NetworkStatus: Ended
Operation: L.O.V.E.
star
6.46
13 votes

#1 - Operation: L.O.V.E.

Season 4 - Episode 19 - Aired 7/15/2005

Numbuh 3 stars in a romantic musical as the lead girl, but when Numbuh 4 interrupts the play, it becomes a real war on stage between the DCFDTL and the KND.

Operation: K.N.O.T.
star
6.55
11 votes

#2 - Operation: K.N.O.T.

Season 4 - Episode 15 - Aired 5/20/2005

Numbuh 1 battles a group of snake ties with an adult against them.

Operation: B.R.I.D.G.E.
star
6.64
14 votes

#3 - Operation: B.R.I.D.G.E.

Season 6 - Episode 9 - Aired 1/12/2007

Numbuh 20,000 and his Squid Squad work with Sector V to destroy the bridge leading into Le Sissie, a store in the mall that sells horrible back-to-school clothes for kids.

Watch Now:Apple TV
Operation: K.A.S.T.L.E.
star
6.69
13 votes

#4 - Operation: K.A.S.T.L.E.

Season 3 - Episode 12 - Aired 7/30/2004

Numbuh 3 is forced to be married to King Sandy (again) when she is at a Rainbow Monkey theme park, but the others will not believe her.

Operation: M.E.S.S.A.G.E.
star
6.73
15 votes

#5 - Operation: M.E.S.S.A.G.E.

Season 6 - Episode 8 - Aired 1/5/2007

Numbuh 2 attempts to deliver the fourth grade president's message.

Watch Now:Apple TV
Operation: H.O.M.E.
star
6.75
12 votes

#6 - Operation: H.O.M.E.

Season 5 - Episode 21 - Aired 8/10/2006

Numbuh 3 takes her "My First Rainbow Monkey" to a Rainbow Monkey Retirement Home, but it seems to be more than what it appears to her and Numbuh 5.

Operation: D.I.A.P.E.R.
star
6.75
16 votes

#7 - Operation: D.I.A.P.E.R.

Season 5 - Episode 3 - Aired 9/25/2005

The KND go to rescue babies from the hospital to protect them from becoming automatic adults. Numbuh 5 thinks the others are insane and tries to bring them back, but the babies themselves have other plans.

Operation: M.I.S.S.I.O.N.
star
6.77
13 votes

#8 - Operation: M.I.S.S.I.O.N.

Season 5 - Episode 19 - Aired 7/13/2006

Numbuh 4 releases Mr. Boss, Stickybeard, Count Spankulot, and Soccer Mom from their cells. At his home he gives them sodas which he tricks them into thinking that they were poisoned, and tells them that he'll give them the antidote if they beat his dad in a bowling tournament.

Operation: L.U.N.C.H.
star
6.79
14 votes

#9 - Operation: L.U.N.C.H.

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

Lizzie feels that Nigel works too much during lunch, so she forces him to have lunch with her, but he cannot work. Meanwhile, a group of lunch thieves and their leader Robin Food break into the cafeteria and start stealing everybody's lunches, including Lizzie and Numbuh 1's.

Watch Now:Apple TV
Operation: L.I.C.O.R.I.C.E.
star
6.79
39 votes

#10 - Operation: L.I.C.O.R.I.C.E.

Season 5 - Episode 20 - Aired 8/10/2006

Heinrich comes back, but this time needs to be saved by Numbuh 5 as she recruits Stickybeard and his band of candy pirates to help her rescue Heinrich from Black John Licorice and his pirates.

Operation: C.A.N.N.O.N.
star
6.79
39 votes

#11 - Operation: C.A.N.N.O.N.

Season 1 - Episode 2 - Aired 12/6/2002

Numbuh 4 forces the other operatives to build a "clam cannon" when Numbuh 1 leaves.

Operation: H.O.L.I.D.A.Y.
star
6.82
17 votes

#12 - Operation: H.O.L.I.D.A.Y.

Season 5 - Episode 12 - Aired 1/21/2006

Numbuhs 2 and 3 try to guide a plane full of hamsters. Meanwhile, Lizzie is jealous of a girl Numbuh 1 is hanging out with, and races over to try to keep Nigel from "dating" her.

Operation: A.M.I.S.H.
star
6.83
12 votes

#13 - Operation: A.M.I.S.H.

Season 6 - Episode 17 - Aired 11/2/2007

Sector V sends Numbuh 2 into hiding at an Amish sector to his extreme dismay.

Operation: D.O.D.G.E.B.A.L.L.
star
6.83
12 votes

#14 - Operation: D.O.D.G.E.B.A.L.L.

Season 4 - Episode 21 - Aired 7/22/2005

Numbuh 4 tries to battle against the Dodgeball Wizard for his rank.

Operation: T.U.R.N.I.P.
star
6.87
52 votes

#15 - Operation: T.U.R.N.I.P.

Season 1 - Episode 7 - Aired 12/27/2002

When turnips are found everywhere in Sector V's treehouse, they go to the source: a giant turnip, to defeat it.

Operation: S.P.A.N.K.
star
6.89
18 votes

#16 - Operation: S.P.A.N.K.

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

Count Spankulot joins the KND and turns from his evil ways.

Operation: U.N.C.O.O.L.
star
6.91
11 votes

#17 - Operation: U.N.C.O.O.L.

Season 3 - Episode 19 - Aired 10/29/2004

The KND try to find Numbuh 78 in a treehouse infested with Nerd Zombies.

Operation: C.A.R.A.M.E.L.
star
6.91
11 votes

#18 - Operation: C.A.R.A.M.E.L.

Season 6 - Episode 19 - Aired 11/16/2007

Heinrich uses a ritual involving sacred golden caramels to take away the qualities the Sector V operatives value the most (Numbuh 1's leadership, Numbuh 2's intellect, Numbuh 3's giddiness, Numbuh 4's toughness, and Numbuh 5's coolness). Numbuh 5 eventually teaches Heinrich that he needs to share his candy to revert to his original form, she is then seen leaving with a young blonde girl.

Operation: H.O.U.N.D.
star
6.93
14 votes

#19 - Operation: H.O.U.N.D.

Season 3 - Episode 23 - Aired 11/12/2004

Numbuh 5 comes face to face with a vicious dog who is always eating her homework.

Operation: S.A.T.U.R.N.
star
6.94
17 votes

#20 - Operation: S.A.T.U.R.N.

Season 4 - Episode 10 - Aired 4/29/2005

The KND try to stop a mysterious being from collecting all the Rainbow Monkeys in the world-- including Numbuh 3's beloved ones.

Watch Now:Apple TV
Operation: J.E.W.E.L.S.
star
7.00
12 votes

#21 - Operation: J.E.W.E.L.S.

Season 3 - Episode 17 - Aired 8/13/2004

Numbuh 5 journeys to the exotic Al-Shugar Desert to recover her stolen candy, the Blurpleberry Supreme, and discovers she's not the only one searching for the powerful, mystical candy.

Operation: C.O.U.C.H.
star
7.00
11 votes

#22 - Operation: C.O.U.C.H.

Season 4 - Episode 20 - Aired 7/15/2005

Numbuh 4 tries to battle it out with an evil adult in his couch.

Operation: T.R.A.I.N.I.N.G.
star
7.00
16 votes

#23 - Operation: T.R.A.I.N.I.N.G.

Season 3 - Episode 8 - Aired 7/16/2004

Tommy, Sonia, and Lee find that the training simulations in the Arctic Base are real.

Operation: T.R.I.C.K.Y.
star
7.04
67 votes

#24 - Operation: T.R.I.C.K.Y.

Season 3 - Episode 18 - Aired 10/29/2004

Numbuh 4 tries to get his candy back from Stickybeard on Halloween.

Operation: T.A.P.I.O.C.A.
star
7.05
19 votes

#25 - Operation: T.A.P.I.O.C.A.

Season 2 - Episode 6 - Aired 10/17/2003

Numbuh 2's grandmother joins forces with her friends to locate a pudding supply, which was trapped between the surface of the treehouse.