Codename: Kids Next Door
0Loading crowd target
0Loading crowd target
6correct to beat the crowd
50 free Codename: Kids Next Door trivia questions with answers — trivia quiz, new questions added Oct 2026.
Codename: Kids Next Door ran on Cartoon Network from 2002 to 2008 and turned every childhood grievance into a spy mission. A team of ten-year-olds in a towering treehouse took on bedtimes, dentists and broccoli with gadgets built from junk. Its acronym-titled operations, running gags and slow-burning mysteries made it one of the channel's best-loved originals. This quiz covers the whole operation: the members of Sector V and the numbers they answer to, the villains who plot against them, standout missions from the pilot to the finale, and the people who wrote, drew and voiced the series. It opens with questions most fans will know and works up to details only a veteran operative would recall. Play it to settle an argument with a fellow fan, to revisit a favourite cartoon, or to find out whether you would have passed cadet training. Every answer comes with a short explanation, so you will pick up a few stories behind the show along the way.
30 of 50 questions with answers and explanations. Play the quiz
Q 01Where is the main headquarters of the worldwide Kids Next Door organization, itself a giant treehouse?
On the Moon
On the Moon sits the organization's treehouse command base. Sector V once staged a fake lunar colony in Hollywood so that adults sent up to settle there would never discover it.
Q 02Which small animals power the treehouse and weapons of Sector V in Codename: Kids Next Door?
Hamsters
Hamsters keep Sector V's base running, and it shows when they leave. In one mission they go on vacation, the treehouse loses power and Gramma Stuffum attacks the defenceless team.
Q 03Numbuh 3 of Codename: Kids Next Door is devoted to which line of stuffed toys?
Rainbow Monkeys
Rainbow Monkeys are Numbuh 3's great love, and villains exploit it. The boss of the company that makes them once used her to track down real, living ones for him.
Q 04Father, the shadowy arch-nemesis of Kids Next Door, turns out to be which relative of Numbuh 1?
His uncle
His uncle is the twist: Father is the brother of Numbuh 1's dad, Monty. The feud runs a generation deeper too, because the brothers' own parent is the tyrant Grandfather.
Q 05In a running Kids Next Door plot, what do Sector V try to steal from the Delightful Children every year?
Their birthday cake
Their birthday cake is the prize in a whole string of missions. One plan to pelt the party with eggs backfires when a chick hatches out of every single one.
Q 06What is wiped from Kids Next Door operatives when they are decommissioned on turning 13?
Their memories
Their memories of every mission go, along with all knowledge of the organization. Those who dodge the process often turn villain, which is how the heroes gained teenage enemies who know their secrets.
Q 07What is the real name of the no-nonsense leader of Sector V in Codename: Kids Next Door?
Nigel Uno
Nigel Uno leads Sector V with total devotion. He neglects his girlfriend for missions so often that she once strapped a mind-control helmet on him to win his attention.
Q 08Kids Next Door met characters from which other Cartoon Network series in a 2007 crossover special?
Billy & Mandy
Billy & Mandy shared the half-hour special, The Grim Adventures of the KND. In it Mandy tricks her way into running the whole organization while Numbuh 1 is stuck posing as Billy.
Q 09What decided that the Codename: Kids Next Door pilot would become a full Cartoon Network series in 2001?
A viewers' poll
A viewers' poll crowned the pilot in a Cartoon Network event called The Big Pick II, and first place came with a full series order. The runner-up, A Kitty Bobo Show, never became a series.
Q 10Numbuh 5 of Codename: Kids Next Door is known for which unusual way of speaking?
Using third person
Using third person, a habit called illeism, is her trademark: she says Numbuh 5 where others would say I. The relaxed second-in-command of Sector V also doubles as the team's spy.
Q 11Which cheerful Sector V operative of Kids Next Door goes by the code name Numbuh 3?
Kuki Sanban
Kuki Sanban is Sector V's happy-go-lucky medic and tactician. Her mother is the boss of Numbuh 2's mom, who once invited the whole family over in the hope of a promotion.
Q 12What nickname does Numbuh 2, the joke-cracking engineer of Sector V in Kids Next Door, go by?
Hoagie
Hoagie is short for Hogarth, the engineer who builds the team's machines. He once had to hide out with an Amish sector, hating every minute, while a mystery enemy kidnapped fellow scientists.
Q 13Numbuh 4, the short-tempered fighter of Sector V in Kids Next Door, is which nationality?
Australian
Q 21Which villain, really named Lou Pottingsworth III, do Kids Next Door and fellow villains rate the lamest?
The Toiletnator
The Toiletnator is shunned by heroes and villains alike. When other villains capture the Sector V treehouse, he arrives sure he is finishing the heroes off and undoes the whole scheme.
Q 22Which actor voices Stickybeard, the candy-loving pirate captain in Codename: Kids Next Door?
Mark Hamill
Mark Hamill plays the sugar-crazed captain. His pirate crew once raided the Sector V treehouse for its sweets and carried off Numbuh 5 along with the loot.
Q 23Which corporate villain of Kids Next Door turns out to be the dad of the Head of Decommissioning?
Mr. Boss
Australian Numbuh 4, real name Wallabee Beetles, is the team's brawler. His baby brother may be tougher still, having beaten several villains while still a baby.
Q 14Which cool-headed second-in-command of Sector V in Kids Next Door is known as Numbuh 5?
Abby Lincoln
Abby Lincoln is the team's unflappable spy and a devoted hunter of rare treats. That passion has taken her aboard a pirate ship and across a desert to win back a stolen prize.
Q 15Which girlfriend of Numbuh 1 in Kids Next Door constantly competes with his missions for attention?
Lizzie Devine
Lizzie Devine dates Numbuh 1 for most of the run and once even seized command of his team. The couple finally break up in season 6.
Q 16Which older sister of Numbuh 5 turned against Kids Next Door and became field leader of the Teen Ninjas?
Cree
Cree once led Sector V herself before escaping decommissioning. She still cares about her little sister and keeps hoping Numbuh 5 will come over to the teenagers' side.
Q 17Which little brother of Numbuh 2 keeps begging to join Sector V on missions in Kids Next Door?
Tommy
Tommy finally becomes an operative, then gives it up within a single mission. He deletes himself from the organization's code module to foil Father and carries on alone as a vigilante.
Q 18What kind of animal is Bradley, the honorary Numbuh 6 of Sector V in Kids Next Door?
A skunk
A skunk rescued from the streets by Numbuhs 2 and 3, Bradley was made an honorary operative. After a car hit him, he was converted into a cyborg to save his life.
Q 19Father, the silhouetted villain of Codename: Kids Next Door, attacks operatives with which power?
Fire
Fire is Father's weapon, wielded from inside a suit that shows only his silhouette. When a doctor sent him away for a day, teenagers threw so wild a party at his mansion that his own children called Sector V for help.
Q 20Which drink do the adults of Kids Next Door make illegal for anyone under 13 in a bootlegging mission?
Soda pop
Soda pop becomes contraband once the legal age is raised. Numbuh 2 is caught selling it illegally in a bar and stumbles on an industrialist's plot to bottle children.
Mr. Boss runs Werk Co. and ranks second among the organization's enemies. The reveal comes when operatives rescue a small boy from a haircut and end up fighting the boy's dad.
Q 24In the Kids Next Door pilot, Mr. Wink and Mr. Fibb anger local children by extending what at the pool?
Adult swim time
Adult swim time is the excuse the two villains use to keep children out of the neighborhood pool. The short, No P in the Ool, went on to win the contest that turned the idea into a series.
Q 25In Kids Next Door, Numbuh 5 searches a temple for the legendary Fourth Flavor of which treat?
Ice cream
Ice cream has a long-lost extra flavour in the show's mythology, and only someone with pure taste buds may taste it. Numbuh 5 is kidnapped and made to find it for the Delightful Children.
Q 26What does Numbuh 4 accidentally eat in Kids Next Door, forcing his team to stop it being digested?
A Brussels sprout
A Brussels sprout counts as an emergency for Sector V. The rest of the team launch a rescue in the style of the film Fantastic Voyage to reach the dreaded vegetable before his stomach does.
Q 27Fanny Fulbright, Head of Decommissioning in Kids Next Door, is better known by which operative number?
86
Numbuh 86 is also the organization's Global Tactical Officer. Her constant yelling wears down the boys of Sector V when they have to hunt an escaped prisoner alongside her.
Q 28In the Kids Next Door finale, Numbuh 1 says goodbye to Sector V in order to join which organization?
Galactic KND
Galactic KND fights adulthood across many planets, and it picks Numbuh 1 as its first operative from Earth. A hidden faction had been quietly assessing him all season.
Q 29Which legendary discovery do Sector V of Kids Next Door find hidden in the depths beneath their school?
The Fountain of Youth
The Fountain of Youth tempts the team with the chance to stay ten years old forever. They are led to it by a classmate who has strangely aged into an old woman.
Q 30Rachel McKenzie, Supreme Leader of the Kids Next Door organization, is known by which operative number?
362
Numbuh 362 grows so weary of command that she once tried to resign. Her little brother leads Sector W, the younger team that races Sector V in the series finale.