Odd Squad (stylized in all caps) is a live action children's educational comedy television series created by Tim McKeon and Adam Peltzman. The series premiered on TVOKids in Canada and PBS Kids in the United States on November 26, 2014. Similar to Cyberchase and Peg + Cat, the series involves child characters using mathematical concepts (addition, multiplication, using data in graphs, etc.) to advance each episode's plot. The series features child actors (whose characters are the employees of the "Odd Squad") who use indirect reasoning and basic math to solve and investigate strange happenings in their town.
Description The series follows the exploits of Odd Squad, an organization run entirely by children, that solves peculiar problems using math skills. In the first two seasons, it typically features two employees of the organization's investigation division that work in precinct 13579 of the organization—Agents Olive (Dalila Bela) and Otto (Filip Geljo) in the first season and Olympia (Anna Cathcart) and Otis (Isaac Kragten) in the second season. Selected episodes feature other types of employees of the fictional organization, like security officers, so-called "tube operators" and scientists. The names of the employees nearly always start with the letter O. Agents are typically assigned cases by their boss, Ms. O (Millie Davis), and travel via a system of interconnected tubes to get to their destinations. They deduce the solution to the problem or how to detain the perpetrator by using basic mathematical principles that are typically the focus of the episode. Often, they cannot solve the problem at the scene and must go back to their precinct's headquarters or to the "Mathroom", a sentient space that communicates through large paper fortune tellers and can unfold them to display information to help the agents see connections and better solve their case. Along with math, agents also use "gadgets" designed by the scientists; in the first season, Agent Oscar (Sean Michael Kyer) heads the lab, gaining an assistant, Agent Oona (Olivia Presti), in early season two who eventually takes over the lab after Oscar is promoted.
The characters have to deal with a variety of recurring villains who often put a mathematical spin on their plots. The third season, dubbed Odd Squad Mobile Unit, sees a setting change from precinct 13579 to a van; in this season, four agents are assigned by the Big O (Davis) to work in the van and travel the world solving cases where local precincts either can't reach or need extra help. The fourth season, dubbed Odd Squad UK, is set in an Odd Squad location in the United Kingdom. A fifth season premiered in 2026, set in the same UK precinct as Season 4 and focused on the same two agents as Season 4 as well as two new agents. The fifth season had a heavier sci-fi theme.
Cast and characters Character Portrayed by Appearances Season 1 Season 2 Season 3 Season 4 Season 5 Specials 3A 3B Agent Olive Dalila Bela colspan="2" colspan="2" Agent Otto Filip Geljo colspan="2" colspan="2" Ms. O / Big O Millie Davis colspan="4" colspan="2" Agent Oscar Sean Michael Kyer colspan="2" colspan="2" Agent Olympia Anna Cathcart colspan="2" Agent Otis Isaac Kragten colspan="2" Agent Oona Olivia Presti colspan="2" Agent Opal Valentina Herrera colspan="2" colspan="3" Agent Omar Jayce Alexander colspan="2" colspan="2" colspan="3" Agent Oswald Gavin MacIver-Wright colspan="2" colspan="2" colspan="3" Agent Orla Alyssa Hidalgo colspan="2" colspan="2" colspan="3" Agent Osmeralda Glee Dango colspan="2" colspan="3" Orpita / Little O Shazdeh Kapadia colspan="2" colspan="3" Agent Ozzie Alexander Shaw colspan="4" colspan="2" Agent Orli Asha Soetan colspan="4" colspan="2" Captain O Shelly Lagodinsky colspan="4" colspan="2" Agent Onom Samir Simon-Keegan colspan="4" colspan="2"
Main
Agent Olive (Isabela Moner, pilot; Dalila Bela, season 1): Referred to as a longtime employee of the Odd Squad, Olive began season one of the series adapting to working with and training her new partner, Otto. Olive is usually calm, brisk and serious. She has a morbid fear of pies, which she acquired after saving her organization's building from a pie-related disaster caused by her former partner, Todd. In the season one finale, Olive departs the series along with her partner, Otto, to run a different Odd Squad precinct as Ms. O. Agent Otto (Jaden Michael, pilot; Filip Geljo, season 1): Olive's partner and, in the first episode, the newest employee of the organization. In contrast to his partner's more serious demeanor and personality, he is a more lenient, laid-back employee. Despite his lack of experience with his job, Otto frequently uncovers the facts needed to solve the case at hand, even doing so in the absence of his more experienced partner. In the season finale, Otto departs the series to run another Odd Squad precinct as Mr. O with Olive as his partner. Big O (Millie Davis, seasons 1-3): Known as "Ms. O" (the title of any female head of an Odd Squad division) in the first two seasons, she is a very strict boss. She tends to yell (a habit seen less frequently as the series progresses) and is often seen sipping a juice box. Despite appearing younger than most of the agents, Ms. O's tenure at the precinct and her actual age remain a mystery. In-show, it is revealed that her actual name is "Oprah." In the season two finale, Ms. O is promoted to the rank of Big O, the leader of the entire Odd Squad organization. She leaves the show after the Season 3 episode "Odd Off The Press" due to traveling to outer space, appointing Orpita, an agent-in-training, as the Little O to replace her. Agent Oscar (Sean Michael Kyer, seasons 1-2): Oscar was the precinct's head scientist in charge of the laboratory. Other employees go to him for technical solutions to their problems. Oscar is depicted as being very intelligent and having a quirky and goofy personality. He leaves the show after the Season 2 episode "Oscar Strikes Back," where he becomes the president of the organization's science division after the former president is dismissed for misconduct. He appoints Agent Oona to take over for him. Agent Olympia (Anna Cathcart, season 2): Introduced in the first episode of season two, Olympia joins the series to fill in the opening left by the departure of Olive in the season one finale. She was given early graduation from the organization's training academy. She is depicted as being very sociable and outgoing and having a generally happy and carefree personality. Agent Otis (Isaac Kragten, season 2): Like Olympia, Otis was introduced at the start of season two, brought in to fill the opening left by the departure of Otto in the season one finale. Unlike his partner, he has a more serious and socially reserved personality. There are no records of him attending the organization's academy, but he is depicted as being the more seasoned member of the new team. He has a fear of ducks, revealed in the season two finale to be related to the fact he was once part of a family of villainous ducks. Ms. O took pity on Otis and trained him herself to become an Odd Squad agent. Agent Oona (Olivia Presti, season 2; special guest season 3): Initially Oscar's assistant, she takes up his position after his departure. Like Oscar, she is depicted as having a quirky personality. Agent Opal (Valentina Herrera, season 3): Originally stationed at a precinct in the Arctic with Omar, she is competitive with a strong desire to be working on cases important to combating oddness, viewing herself as the leader of OSMU. Opal's sister, Olizabeth, is The Shadow. She departed the series after the Season 3 episode "End of the Road" because she is staying with Olizabeth to fix the damage done in Australia. Agent Omar (Jayce Alexander, season 3): Originally stationed in the Arctic with Opal, he is known to value friendship and connection with his fellow agents, often attempting to mediate or calm the waters among his team, although his tendency to do so can sometimes distract him from the mission at hand. Agent Oswald (Gavin MacIver-Wright, season 3): Before being assigned to the Odd Squad Mobile Unit, Oswald worked as the only employee of the Odd Squad museum in New York City. Having spent his entire career behind a desk, he is often excited to jump into tasks or cases. Agent Orla (Alyssa Hidalgo, season 3): Orla joins the Odd Squad Mobile Unit after being isolated for 400 years at an ancient Odd Squad headquarters protecting the powerful 44-leaf clover. Because of her separation from society at large and her history standing guard, she is often unfamiliar with modern inventions and has a tendency to react to situations quickly and without forethought. Agent Osmeralda (Glee Dango, season 3): Appearing as Esmeralda Kim in early season 3, she often showed up desiring to help but stating she was too busy with various hobbies such as karate or music instrument practice. In "Odd Off the Press," having finally cleared up her schedule, she is brought in to fill the opening left by the departure of Opal. She brings her out-of-the-box thinking skills to the team. Little O (Shazdeh Kapadia, season 3): Formerly Big O's assistant, she takes a position as a substitute for Big O as the head of Odd Squad at the end of "Odd Off the Press." Agent Ozzie (Alexander Shaw, season 4): An agent at an Odd Squad precinct in the United Kingdom. Agent Orli (Asha Soetan, season 4): An agent who lives and works in Niagara Falls and is called to the United Kingdom Odd Squad precinct to assist in stemming the rising oddness rates. Captain O (Shelly Lagodinsky, season 4): The head of an Odd Squad precinct in the United Kingdom. Agent Onom (Samir Simon-Keegan, season 4): A scientist at an Odd Squad precinct in the United Kingdom. Agent Orwell (Alexander Joseph, season 4) A security agent at an Odd Squad precinct in the United Kingdom. Agent Osgood (Zach Bent, season 4) The cook of an Odd Squad precinct in the United Kingdom. Agent Opie (Halle Brady, season 4) The new agent of the Department of Help after Ozzie becomes an agent. Agent Omni (Mimi Soetan, season 5) Agent Osric (Dalton Jones, season 5)
Recurring
Odd Squad employees
Dr. O (Peyton Kennedy, seasons 1–2; Kaden Stephen, season 2): The precinct's resident medical employee who assists others with medical-related problems. She's known for her eccentric behavior and frequently says nonsensical stuff; often her dialogue references popular science fiction series like Star Trek or Doctor Who. It is revealed in-show that she was once a worker in the Odd Squad gift shop, but became a doctor when the gift shop was shut down. After the original Dr. O leaves to work as a doctor in space, she is replaced with a new male doctor who previously worked in another department. Agent Obfusco (Jaeden J. Noel, season 1): An Odd Squad agent and cross-cultural expert who speaks in obscure riddles, a characteristic intended to teach viewers how to understand word problems. He is eccentric and difficult for the other agents to understand, which leads them to try to avoid working with him. Agent Ocean (Elijah Sandiford, season 2): The precinct's director of the 'Creature Room,' which houses many bizarre creatures and plants which Odd Squad agents may need to know about. Ocean has a laid-back and easy-going personality. Agent Octavia (Julia Lalonde, season 1): Agent Oz's partner. It was noted in an episode that she is one of the precinct's best employees. She is usually looking for her partner because he is invisible. Agent O'Donahue (Tate Yap, season 1–2): Ms. O's partner after Olga went to the odd side. He was Ms. O's partner up until the 1980s when he and Oprah (Ms. O) failed to solve a case featuring a mysterious villain Equal Evan. He then quit, but returned 30 years later to help his partner finally solve the case. Now he pretends to be retired while secretly solving cases undercover for Ms. O.