The agents must come together to battle a common enemy.

In this half-hour episode, Olive is put on trial for causing oddness.

Olive and Otto have to crack a case in which a group of people have been turned into puppets. With the help of Odd Squad, Delivery Debbie and Delivery Doug must figure out why their food is disappearing.

Olive and Otto must stop a villain who has turned townspeople and Odd Squad agents invisible. When Agent Obfusco’s moustache is stolen, it’s up to Olive and Otto to get it back.

In this half-hour episode, the tube system breaks and Olive and Otto are left stranded in a dangerous forest.

When a miffed O’Brian won’t let Olive access the tubes, she has to solve the mystery of what she did to upset him. Olive tells Otto the story of what happened to Octavia's partner, Agent Oz.

The Mobile Unit is sent to New York City to fill in for the local Odd Squad agents, who are on strike because they don't like what's being served for lunch. It's up to Opal and Oswald to figure out what they would like to eat. Meanwhile, Orla and Omar must venture out into the city to solve oddness, and see the sights along the way. Agent-in-training Orpita decides to do her agent profile report on Omar, who is on creature duty, while the rest of the Mobile Unit goes out to defeat a giant robot. But when Orpita turns out to be too laidback, Omar must use fractions to feed the creature properly before it grows too big and escapes.

Olive and Otto face their biggest challenge yet.

Security agents Owen and Ohio secretly provide backup on a case so they can have a pizza party. An unlucky coin is accidentally released to the public.

When Ms. O's office must be repaired due to odd infestations, she cramps Olympia and Otis's style. Ms. O needs Otis and Olympia's help to track down her old partner O'Donahue.

Olympia uncovers a secret about her partner.

When the alarm system at Headquarters is triggered, Olive, Otto, Ms. O, and Oscar must avoid a series of booby traps in order to shut it off. Olive and Otto explain to Ms. O how a case went wrong, each in their own way.

Agents recall how a beloved gadget helped them. The agents bring someone with an odd problem back to headquarters.

Olive and Otto must figure out how and why things are disappearing around town when all Otto wants to do is listen to a song by his favorite band, Soundcheck. Debbie from Debbie's Pizzeria has doubled... not once, but twice... creating four Debbies! When one of the Debbies go missing, Olive and Otto need to find her.

In this Christmas-themed episode, Olive and Otto help Santa track down his reindeer when they are accidentally shrunk. Also, Oscar helps Ms. O get off Santa's naughty list by making sure the number of nice things she has done is greater than the number of naughty.

Olympia, Otis, Oscar and Oona are accidentally transported to the future. Otis is asked to make a recruitment commercial for Odd Squad, however Ms. O proves to be difficult to work with.

Olympia and Otis are forced to babysit Baby Genius. Oona accidentally switched bodies with a fly.

Olive and Otto are sent to Shapely Manor to investigate an odd crime with even odder people.

When a blob gets loose in Odd Squad headquarters, Olive and Otto compete against rival agents to catch it first. When people in town can no longer count down, Olive and Otto must uncover who is causing the problem and why.

When Ms. O gets trapped in a mirror, an opposite Ms. O enters the real world. The agents try to resolve a disagreement between Ms. O and Oksana.

When several of Oscar’s Oscarbots (robots made in his own image) become lost in town, Olive and Otto must help him find them. Otto and Olive must figure out why people in town are becoming plaid and striped.

It's party time for all the new agents at Odd Squad. Delivery Doug needs help with an egg situation.

Chaos ensues when one of Oscar’s Oscarbots malfunctions. When Agent Ori’s first day on the job turns into a worst-case scenario, other Odd Squad agents share their own ‘worst first day ever’ stories.

Otto and Oscar try to stop Olive from turning into a pirate. Oscar accidentally turns himself into a couch.

When a new room opens up in headquarters, all the agents want a piece. Getting a villain back to headquarters proves cumbersome when the tubes are down for maintenance.

When every agent turns into a puppy, it's up to Agent Ohlm to save the day. Dr. O gets an odd illness called the Sillies.

Oscar takes some time off so he can attend Lab-Con--for the first time. However, someone is controlling the minds of all of the convention attendants except for Oscar, Miss O and Oona. No one's going to ruin Oscar's first Lab-Con. It's time that "Oscar Strikes Back".

Oona, Olympia and Otis try to escape from a time loop. A villain sets off a backwards bubble that causes everyone at headquarters to move backwards.

In this half-hour episode, Odd Squad agents compete in Olympic style games to determine who gets to be Ms. O for the day.

A villain steals Ms. O's voice. The agents are called in to help when Ohlm and Orchid have problems working together.

Oona uses her Oonabots to fix an odd problem. Odd Squad must go undercover to recover a stolen gadget.

Delivery Debbie goes undercover to stop a group of villains. When Olympia finds out Dr. O is leaving, she struggles to throw the best goodbye party ever.

Odd Squad is haunted by a ghost. Owen and new recruit Ozlyn wait out a storm while transporting a creature.

Other Olympia - Olympia squares off with another Agent named Olympia. Total Zeros - Ms. O tells Olympia and Otis an old story about a villain duo with the power of zero.

In order to save humanity, Olive and Otto must locate a treasure chest that Oscar buried. The agents throw a surprise party for Ms. O.

Agents compete against rival Odd Squad agents to solve an odd problem. Otis and Olympia investigate why people in town are stuck in slow motion.

Otis and Olympia stop werewolf Olaf from turning back into a boy. Otis struggles with his new high-tech agent's jacket.

Odd Squad builds an exact replica of the villain's vault to intercept a jetpack. Olympia tries to win back a stolen gadget on a villain game show.

In this half-hour episode, dinosaurs break out of the dinosaur room in headquarters and Olive and Otto must travel back in time to save the day.

Olive and Otto battle Oren and Olaf for the best chairs at Odd Squad while Ms. O and Oscar run a top secret mission. Olive and Otto become concerned when they find out their Odd Squad test is being administered by Agent Obfusco - a mysterious agent who speaks only in word problems.

When Ms. O has bizarre side effects after being sprayed by a weird plant, Olive and Otto must travel around town finding the correct measurements of the ingredients for the medicine to cure her, all while keeping Ms. O's condition a secret from her. The only thing that can bring Ms. O’s old partner O’Donahue out of retirement is the very thing that put him there in the first place: a mysterious villain and a case that’s gone unsolved for years.

A special task squad may close HQ. Dr. O's replacement struggles to help patients who suffer from a bizarre ailment.

It Takes Goo to Make a Feud Go Right: Olympia and Otis are tasked with calling a truce between feuding guests. Friends of Odd Squad: Ms. O leaves headquarters in the hands of an unlikely crew.

The agents try and stop baby Agent Orson from getting kicked off the squad. Oona gets zapped to an alternate dimension.

Agent Opal and Agent Omar are tired of their post at the Arctic Odd Squad Headquarters, because nothing odd ever happens there. Luckily, Opal thinks she may have uncovered the location of a legendary Odd Artifact: a 44-leaf clover. The only problem is, villains are also hot on its trail. In the wrong hands, the clover could cause worldwide, catastrophic oddness! With the help of fellow agents, Opal and Omar must find and save the 44-leaf clover before it's too late. Curriculum: Measurement, Simple Machines

Agent Opal and Agent Omar are tired of their post at the Arctic Odd Squad Headquarters, because nothing odd ever happens there. Luckily, Opal thinks she may have uncovered the location of a legendary Odd Artifact: a 44-leaf clover. The only problem is, villains are also hot on its trail. In the wrong hands, the clover could cause worldwide, catastrophic oddness! With the help of fellow agents, Opal and Omar must find and save the 44-leaf clover before it's too late. Curriculum: Measurement, Simple Machines

The Mobile Unit's first case is all the way across the world in Japan. Orla is disappointed when the task is super simple: return a plant to the 17th dimension. All it requires is putting together a build-it-yourself portal. But when Orla rushes through constructing the portal without reading the instructions, Omar, Oswald, and Opal end up stuck in the 17th dimension. Oswald finally lands an interview on a famous Odd Squad podcast to talk about the new Mobile Unit van. But he is only familiar with the main floor of the van and hasn't yet ventured into any of the other 87 floors, including those below ground level. In his attempt to learn more about the van, Oswald gets lost and risks missing his interview altogether.

On the way to deliver a baby blob to The Big O in London, England, the Mobile Unit van runs out of fuel. The team must refuel quickly and get underway before the baby blob's big brother completely blobs London as it searches for its little brother. Problem is, the van runs on water, and they're stranded in the desert. Curriculum: Liquid Measurement, Porous vs. Non-Porous

Omar has great plans to surprise Orla with a 500th birthday party. But due to some intense Odd Squad history, normal party gifts aren't going to fare well with her. So, while Opal keeps Orla busy with a string of false villain leads, Oswald and Omar must track down the ideal birthday presents. While solving oddness on a farm, the team meets a kid named Jeremy, who is their biggest fan. Opal really wants to shine in front of him, but the team accidentally gets locked out of their van. While half of the Mobile Unit distracts Jeremy, the other half tries to answer the van's security questions using math in order to get back inside.

When the Mobile Unit gets ranked low on the Odd Squad Magazine progress reports, Opal and Orla kick into competitive mode and try to solve as much oddness as possible. Meanwhile, Omar and Oswald visit the Chief of Graph at the Odd Squad Graphing Headquarters in hope of figuring out a safer solution. The Mobile Unit gets called back to the Museum of Natural Odd when Oswald's replacement, Ortho, has gone radio silent. But when they arrive and find out an ancient stone warrior has been let loose, they must de-code Ortho's strange numbering system to capture the stone warrior and save the museum.

The Mobile Unit is called to Pinehurst, North Carolina to stop a villain who is stealing various objects. If they don't catch the villain in time, the local Odd Squad will be forced to cancel their annual mini golf tournament. But the Mobile Unit is having trouble figuring out who the villain is, because they don't know what the stolen objects share in common.

Orla is kicked off the squad when a library book she took out 400 years ago is overdue. The Mobile Unit must use budgeting to turn their $1 into $10 to pay the late fee, or else Orla will not get her badge back. There's a villain turning train cars odd, and the Mobile Unit must figure out the pattern in which the villain is striking. Oswald takes it upon himself to solve the train mystery just like his favorite book character: Detective Shmumbers.

The Mobile Unit is called to Odd Squad's Top-Secret Security Facility where an unknown villain has broken in to get to the mega-computer. But when Lady Bread, Wheelie Dan, and the Utensiler all claim to be the villain responsible, the team must recreate the break-in to discover the true culprit. "The Shadow" hosts a meeting of villains worldwide in order to convince them to join her Villain Network. But when she shows them their decline in villainy on a line graph, it catapults the villains into a game of blame. She must come up with a line graph that will convince them all to join, or her master plan will fail.

When the members of the Mobile Unit get zapped into sandwiches by the villain, Shelly Catessan, The Big O comes to the rescue. As she combs through video footage taken by Omar to celebrate their 100th case, The Big O must use clues she sees in the videos to figure out the order in which the agents were zapped so she can return them to their agent form. Curriculum: Time - Order of Events The Mobile Unit faces a series of challenges that Orla knew was coming from overhearing a sorcerer's conversation 450 years ago. Through flashbacks, Orla shows the rest of the team the times she prepared each of them-unbeknownst to them-for the upcoming challenges. Curriculum: Calendar

When the villain, Confetti Betty, strikes the Odd Squad headquarters in the Arctic, the Mobile Unit returns to help Opal and Omar's old squad. As they attempt to crack the villain's pattern, they must teach the Arctic agents how to solve cases for themselves so that they don't keep getting called back to help. Curriculum: Addition Patterns, Force and Friction

An Odd Squad gadget has been stolen and is being kept in a warehouse run by robots, forcing Oswald to go undercover as a robot to get it back. Since the gadget is being stored in a room only accessible by actual robots, the team must take control of a robot and use coding to program it to retrieve the stolen gadget. Curriculum: Coding The Mobile Unit learns how things might have been if they hadn't joined the team by using "What-Would-It-Have-Been-Like-Inator" helmets. Curriculum: Addition and Doubling