Codename: Kids Next Door

Synopsis

The show revolves around a group of five 10-year old kids (later retconned to be varying ages) codenamed Numbuhs 1, 2, 3, 4 and 5 who are the main home agents that operate at a high-tech treehouse of Sector V, which is a part of a worldwide espionage-style organization called the Kids Next Door. Their mission is to fight crimes against kids (such as homework and flossing), many of which are willingly committed by 'evil' people of every age with advanced 2×4 technology. Numbuh 1 is the bald British boy Nigel Uno, leader of Sector V. Numbuh 2 is the perky and pun-cracking American boy Hoagie P. Gilligan, Jr.. Numbuh 3 is the cheerful Japanese girl Kuki Sanban. Numbuh 4 is the bossy Australian boy Wally Beatles. Numbuh 5 is the smart French girl Abby Lincoln.

Main characters

• Numbuh 1/Nigel Uno (voiced by Benjamin Diskin) - the leader and head operative of Sector V.
• Numbuh 2/Hogarth Pennywhistle "Hoagie P." Gilligan, Jr. (voiced by Benjamin Diskin) - the funny engineer of Sector V.
• Numbuh 3/Kuki Sanban (voiced by Lauren Tom) - the cheerful tactician and medic of Sector V.
• Numbuh 4/Wallabee "Wally" Beatles (voiced by Dee Bradley Baker) - the bossy combatant of Sector V.
• Numbuh 5/Abigail "Abby" Lincoln (voiced by Cree Summer) - the intelligent, relaxed second-in-command/spy of Sector V.

KND Organization

• Numbuh 6/Bradley the Skunk (voiced by Dee Bradley Baker) - a skunk kit that became an honorary operative of Sector V after Numbuh 2 and Numbuh 3 saved him in the streets.
• Numbuh 9/Maurice (voiced by Khary Payton) - A former operative of Sector V who was reinstated to the Teens Next Door, a special operations group that fake being decommissioned in their 13th birthday so they can learn information from both adults and teenagers.
• Numbuh 13 (voiced by Billy West) - The bungler of Sector N. While he means well, he is ignorant to the fact that he is incredibly clumsy, klutzy and moronic. Like the Toilenator, every sector dreads having to work with him, even his own! The leader of Sector N, Numbuh 14/Mary-Lou Sara-Janes Jones (voiced by Lauren Tom), has the literal job of being his damage control, which she resents very much.
• Numbuh 60/Patton Drilovsky (voiced by Matt Levin) - A high-ranking operative of the Kids Next Door Arctic Base.
• Numbuh 65.3/Herbie (voiced by Dee Bradley Baker) - The stuffy and nerdy head communications officer of the KND Moonbase. He often hails Sector V for urgent missions. He also has a soft spot for Numbuh L/Elizabeth "Lizzie" Devine.
• Numbuh 83/Sonia (voiced by Janice Kawaye) - The soda, snacks and treats officer of Sector W. She has a irrational fear of the dark and will go into a blind rage when she is forced towards it.
• Numbuh 84/Lee (voiced by Janice Kawaye) - The tactical yo-yo specialist of Sector W.
• Numbuh 86/Fanny Fulbright (voiced by Jennifer Hale) - The head of the Decommissioning Squad and global tactical officer of the KND.
• Numbuh 92 and Numbuh 93 (voiced by Benjamin Diskin and Tara Strong) - Two KND operatives who reside on the Kids Next Door Moonbase. Their roles are effectively replaced with Numbuh 44A/Pete and Nubmuh 44B/Peter Doblemitz (usually voiced by Lauren Tom), twin operatives who also work as infantry.
• Numbuh 101/Matt (voiced by Ogie Banks) - The head of the KND Seriously Cool Museum of Artifacts and Stuff. He is a mega fan of Sector V, having made a macaroni statue of Numbuh 5, and even having Numbuh 1's infamous Rainbow Monkey underwear; This can turn them off from him. He is also a huge KND history nut, believing in Sector Z and Numbuh 0 even when others thought that they were just myths.
• Numbuh 362/Rachel McKenzie (voiced by Rachael MacFarlane) - The supreme leader of the KND.
• Numbuh 363/Harvey McKenzie (voiced by Jennifer Hale) - The leader of Sector W and Numbuh 362's younger brother. In the series finale, he is a rival of Sector V, who does not like him very much due to his cockiness and dislike of being touched by others. He was decommissioned months later by Numbuh 5 because she got sick of him not wanting to be touched.
• Numbuh 74.239/Gabe and Numbuh Infinity (voiced by Dave Wittenberg and Phil LaMarr respectively) - Two KND operatives who both work for the Splinter Cell, a shadowy faction of the Kids Next Door. They have manipulated events to sign Numbuh 1 to the Galactic Kids Next Door.

Villains

• Father/Daddy Benedict Wigglestein (voiced by Maurice LaMarche impersonating Kirk Douglas when wearing the silhouette suit and Jeff Bennett when not wearing it) - The arch-nemesis of the KND, main villain of the series, leader of the Evil Adult Industries and 'adoptive' father of the Delightful Children From Down The Lane who is also Nigel's paternal uncle and Monty's fraternal twin brother. In "Operation: Z.E.R.O.", the aforementioned family relation is revealed, as well as that Father kidnapped the kids formerly known as Sector Z and permanently brainwashed them to become the Delightful Children, due to the coffee added.
• The Delightful Children From Down The Lane (voiced by Benjamin Diskin, Lauren Tom, Dee Bradley Baker and Cree Summer respectively while delightfulized and Tom Kenny, Rachael MacFarlane, Jason Harris, Dee Bradley Baker and Cree Summer respectively as Sector Z), - Five 'delightfulized' kids, and Father's children/henchmen. In "Operation: Z.E.R.O.", they are revealed to be the former members of Sector Z; Bruce (blonde boy with a bowlcut), Alessandra (brunette blond-haired girl), David (tall, skinny boy with a combover), Lenny (black boy with a football helmet) and Constance Wigglestein (fat girl with brown hair and pigtails), (clockwise from the front). 'Delightfulization' is shown to be a form brainwashing throughout the series, with Sector Z's brainwashing being boosted by coffee blowing a fuse and thus made permanent. As a result, an attempt to reverse it can be only to remove the coffee from inside the Delightful Children's bodies.
• Cree Lincoln (voiced by Cree Summer) - Numbuh 5's older sister, vice leader of the Teen Ninjas and an apprentice of Father. She was originally Numbuh 11. While a dangerous foe, Cree does care about her sister and wished that Numbuh 5 joined the teens just like her.
• Chadworth "Chad" Dickson (voiced by Jason Harris) - Formerly Numbuh 274, Chad was the supreme leader of the Kids Next Door until it was revealed in "Operation: E.N.D." that he had hidden his thirteenth birthday to the KND and arranged Sector V's decommissioning. Due to his treason he allies with the adults and joined the Teen Ninjas. In "Operation: T.R.E.A.T.Y." it is revealed that he was actually a TND operative working for the Splinter Cell.
• Mr. Boss Fulbright (voiced by Jeff Bennett) - A corporate executive and the vice leader of the EAI. He often leads other villains in his plots. In his debut episode, some of Sector V's parents work for him in his office building. In "Operation: D.A.D.D.Y.", it is revealed that he is Numbuh 86's father.
• The Toiletnator/Louis "Lou" Pottingsworth III (voiced by Dee Bradley Baker) - An incompetent cleaner who is considered the lamest villain by the KND and by other villains to the point where Mr. Boss says "Aw, geez, it's the Toiletnator!" when he shows up. He is shown to have toilet based powers as seen within "Operation: C.A.N.Y.O.N.". In a comic spin-off, it is revealed that he is Numbuh 4's long lost uncle.
• Stickybeard (voiced by Mark Hamill) - The candy-loving captain of the Candy Pirates and a rival of Numbuh 5 due to their mutual obsession with sugar. Despite being sour towards the Kids Next Door, he does show a 'sweet tooth' such as saving Sector V from the Great White Asparagus (which he loathes more than kids) and helping Numbuh 5 save Heinrich from cursed licorice pirates.
• Dr. Knightbrace/Jasper Jelly (voiced by Tom Kenny) - A villainous dentist who performs painful and unnecessary dental and orthodontic procedures on the children he ambushes. In his debut episode, "Operation: T.E.E.T.H.", his true identity is Mr. Jelly, the former owner of a candy shop the KND frequently visit. Mr. Jelly wanted to be a dentist since he was a child, but was expelled from dental school for attempting to put braces on babies. He was forced to work in his family's candy store, but went insane and became Knightbrace due to being angered at candy harming children's teeth. Despite his hatred for sweets, he likes taffy.
• The Common Cold/Mr. Worthington (voiced by Tom Kenny) - A sickness-based villain who uses his own snot to render all KND operatives sick so they will be weak on stopping other adults plans. At one point, The Common Cold was defeated by Mrs. Gilligan who used chicken soup on him. He has a niece named Anna Worthington.
• Gramma Chef Stuffum (voiced by Grey DeLisle) - An old lady cook obsessed with force-feeding her disgusting food to children to make them unable to move so that they cannot bother adults. As seen in her debut episode, even the Delightful Children from Down the Lane cannot handle her food. She is often accompanied by a liver and two giggly onions.
• Count Spankulot (voiced by Daran Norris) - A knight vampire who spanks naughty children and was formerly Numbuh S. Like the Toiletnator, he wants to join a group but his spank addiction always gets him rejected. In "Operation: L.O.C.K.D.O.W.N.", he can actually turn people into spank-happy vampires just by taking off his gloves, similar to a vampire bite, and can only be cured by spanking him back.
• Mr. John Wink and Mr. Timothy Fibb (voiced by Tom Kenny and Dee Bradley Baker respectively) - A pair of villains who use robotic chairs to fight. For unknown reasons, Mr. Wink sports bison horns and Mr. Fibb sports walrus tusks. In "Operation: C.O.W.G.I.R.L.", they used to be operatives of the Cowboy Kids' Club, but then, Mr. Wink and Mr. Fibb became villains, due to their former fellow CBKC member, Lasso Lass, going to the prom with Texas Tommy instead of Mr. Fibb. They are a parody of Mr. Wint and Mr. Kidd and adress each other in the same manner.
• Crazy Old Cat Lady (voiced by Grey DeLisle) - An old woman with cat-like features who lives with thousands of black and white cats.

Other characters

• Montgomery "Monty" Uno (voiced by Frank Welker in as an adult, Dave Wittenberg as a child, or Numbuh 0) - Numbuh 1's father. He is later revealed to have started the Seventh Age of the KND after defeating Grandfather.
• Mrs. Uno (voiced by Jennifer Hale) - Numbuh 1's mother and Father's sister-in-law. In "Operation: I.N.T.E.R.V.I.E.W.S.", it is revealed that she was originally Numbuh 999, the first female operative of the Seventh Age.
• Betty Gilligan (voiced by Candi Milo) - Numbuh 2's mother.
• Thomas "Tommy" Gilligan (voiced by Dee Bradley Baker) - Numbuh 2's baby brother. In "Operation: G.R.A.D.U.A.T.E.S.", he temporarily becomes Numbuh T until he resigns himself from the code module, and becomes a vigilante going by the alias of The Tommy.
• Kani Sanban (voiced by Keone Young) - Numbuh 3's father. While high strung and moody, he does love his children. His name means "crab" in Japanese, fitting his crabby personality.
• Genki Sanban (voiced by Lauren Tom) - Numbuh 3's mother. She is a successful businesswoman and is the boss of Betty Gilligan. While she never played with toys as a girl, she does let her daughters have toys as to give them have a happy childhood unlike her. Her name means "energetic" in Japanese, yet Genki is portrayed as quiet.
• Mushi Sanban (voiced by Tara Strong) - Numbuh 3's baby sister. In season 4, she later becomes a villain after "murdering" her sister's new Rainbow Monkey out of jealousy, later she kidnaps Count Spankulot as revenge towards Numbuh 2.
• Sydney Beatles (voiced by Jeff Bennett) - Numbuh 4's father.
• Mrs. Beatles (voiced by Jennifer Hale) - Numbuh 4's mother.
• Joey Beatles (vocal effects provided by Dee Bradley Baker) - Numbuh 4's baby brother. He is surprisingly powerful and witty for being only a baby, defeating multiple villains.
• Dr. Lincoln (voiced by Kevin Michael Richardson impersonating Bill Cosby) - Numbuh 5's father who is inspired by Cliff Huxtable from The Cosby Show due to the fact that they both work as doctors. He used to work as a clown, until his co-worker messed up his joke, ruining their careers. Unlike the other parents, Dr. Lincoln's face is never shown (expect in clown makeup).
• Mrs. Lincoln (voiced by Cree Summer) - Numbuh 5's mother.