Mr. Young

Season 3

TV-Y7

A 14-year-old kid named Adam Young went to college when he was nine. He got a job at Finnegan High School as the science teacher. His best friend Derby and older sister Ivy go to the same school. He develops a crush on Echo Zizzleswift, one of his own students. Echo secretly loves science as much as Adam does. Another of his students, Jordan "Slab" Slabinski, often bullies nerds. Derby is his best friend and always falls asleep in science class.

Where to Watch Season 3

28 Episodes

Mr. Candy
E1
Mr. CandyThe morning after Halloween, the gang tries to remember what they did during their candy-fueled haze the night before
Mr. & Mrs. Roboto
E2
Mr. & Mrs. RobotoArthur returns and makes Adam & Echo babysit Arthur's kids. Meanwhile, Derby and Ivy decide to dress up as robots so they can make friends with Arthur. ARTHUR returns to Finnegan with his new robot family and asks Adam to babysit his "grandkids." Adam agrees and tries to impress Echo with his parenting skills, but soon realizes that dealing with kids is not as easy as it looks.
Mr. Magic
E3
Mr. MagicThe class goes to a Magic Mansion. Adam tries to get rid of everyone with a "magic box" so he and Echo can be alone, and in a string of odd events later ends up trying to saw Echo in half. Meanwhile, Principal Tater tries to get a new membership card.
Mr. Apartment
E4
Mr. ApartmentAdam has trouble getting some peace and quiet at home, so he decides to rent an apartment of his own. But when Derby, Echo, Slab, and Ivy all come over and want to use his new pad for their own purposes, Adam starts to wonder if home wasn't so bad after all.
Mr. Hyde
E5
Mr. HydeAdam makes a drink that will make him more confident to ask Echo out, but it ends up wrong when he turns into a monster. And even worse is that whenever he talks or thinks about Echo being cute he turns into the monster. Now he must stay away from Echo to prevent from turning into the monster. But in the end, Echo accidentally drinks the potion and now when she thinks about Adam being cute she turns into a monster.
Mr. Elf
E6
Mr. ElfWhile returning a lost Rudolph to the North Pole, Adam unintentionally suggests Santa automate his workshop, which results in Santa firing the elves. The unemployed elves follow Adam back to Finnegan to have him put things right. Now it's up to Adam to find them a new job, or deal with their pint-sized wrath.
Mr. Time
E7
Mr. TimeWhile experimenting with a white hole, Adam accidentally causes time in his classroom to move incredibly fast. As he works to solve the dilemma, he and Derby age sixty years over the course of twenty-two minutes. Meanwhile, Echo and Slab team up to stall Tater from entering Adam's class, which would cause the time vortex to spread throughout the school.
Mr. Pickles-In-Law
E8
Mr. Pickles-In-LawWhen a new girl arrives at Finnegan, Derby wins her heart. But when it's revealed she is the daughter of his sworn enemy -- TV Pitchman, Preston Pickles - he is forbidden from dating her. Derby must find a way to pitch himself as good boyfriend material to the ultimate pitchman.
Mr. Sci-Fi
E9
Mr. Sci-FiAdam is hired as a science advisor for a sci-fi movie being shot in Finnegan.
Mr. Tutor
E10
Mr. TutorAdam tutors Ivy in exchange for tickets to a music festival.
Mr. Club
E11
Mr. ClubAdam realizes he and Echo don't have anything in common, so he decides to join a few of her favorite school clubs. But when Adam finds out that Finnegan has a secret club that Echo is in, he'll do anything to join.
Mr. Heart
E12
Mr. HeartEcho gets sick on Valentine's Day, so Adam shrinks down to fight the cold.
Mr. Sasquawk
E13
Mr. SasquawkAfter freeing a Sasquawk, a giant chicken monster, Adam is kidnapped by the beast who loves him.
Mr. Slumber Party
E14
Mr. Slumber PartyIvy invites the cheerleaders over for a slumber party, and Adam panics at the realization that Echo may discover a shrine exposing his true feelings for her. He plans his own slumber party to prevent Echo from entering the basement and learning the truth.
Mr. Double Date
E15
Mr. Double DateAfter a bad date, Echo decides she and Adam should set each other up on a double date. Now, Adam must find a guy who Echo won't fall for. Meanwhile, Echo realizes she might just be the perfect girl for Adam.
Mr. Love Letter
E16
Mr. Love LetterThe Finnegan High time capsule is dug up twenty-five years prematurely and Adam panics when his love letter to Echo is discovered. Luckily, Adam's signature has been destroyed. But when a student claims to be the author of the letter and he and Echo get close, Adam must prove the student is lying, without exposing his true feelings for Echo.
Mr. Freshman
E17
Mr. FreshmanAdam and his mentor, Professor Fenway, try to convince Ivy to sign up for college by telling her about Adam's first day at Great Northern University. But, to Adam's chagrin, Professor Fenway's story involves an embarrassing glimpse into Adam's day as a fourth grader.
Mr. First Impression Part One
E18
Mr. First Impression Part OneIn order to make a better first impression on Echo, Adam uses a time machine to travel back to his very first day as a science teacher.
Mr. First Impression Part Two
E19
Mr. First Impression Part TwoIn order to make a better first impression on his crush Echo, Adam uses a time machine to travel back to the past to meet her for the first time all over again. After returning to the present he realizes his plan has backfired and he has to time travel back again to repair his relationship with Echo. However, the time travel mishaps multiply and spiral out of control and soon Adam’s meddling in the past has him scrambling to keep from being permanently stuck there.Eventually by the end Adam decides to not change the past and goes back to the present. There Echo tells Adam that she likes him and they start dating. They then kiss. They decide to keep it a secret from everyone else.
Mr. First Impression Part Three
E20
Mr. First Impression Part ThreeAdam uses a time machine to go back in time so he can make a better first impression on Echo.
Mr. Memory
E21
Mr. MemoryWhen Derby almost gives away the secret that Adam and Echo are dating, Adam plots to erase Derby's memory. However, Adam gets Preston Pickles to advertise and use Derby to volunteer the Memory-Erase machine but he uses Echo and erases her memory that she is in love with Adam!
Mr. Kidd
E22
Mr. KiddAdam must stop the new, teenaged science teacher, Mr. Kidd, from using Adam's own memory-erasing invention against him. If Adam fails, everyone's memories of him will be erased, and Adam will lose everything. Meanwhile, Ivy and Slab have to do a book report on George Orwell's 1984 ... But first, they have to figure out what it's about.
Mr. Court
E23
Mr. CourtWhen Mrs. Straupersson is found dead, Ivy gets put on trial.
Mr. Budget
E24
Mr. BudgetAfter Adam and Tater struggle to find budget cuts at Finnegan High, Cyclops Foods buys the school and turns it into a product-testing facility. But when a faulty product transforms Derby into an actual cyclops, Adam must find a way to reverse the effects and save Finnegan.
Mr. Interview
E25
Mr. InterviewA TV news program comes to interview Adam about being the world's youngest high school teacher. To ensure the interview goes smoothly, Tater has dumped Echo, Derby, and Slab in a fake version of Finnegan High.
Mr. Spin-Off
E26
Mr. Spin-OffA Hollywood writer comes to Finnegan with the intention of making a TV show about Adam. But he is distracted by Echo, Derby, and Ivy, who all think they have better ideas for TV shows, starring themselves.
Mr. Finale (1)
E27
Mr. Finale (1)Dang is called back to Vietnam to take over for Master Ki as guardian of his village. The gang heads to Vietnam to try and convince Dang to come back to Finnegan for graduation. While there, Adam discovers an ancient scroll that points to the mythical fountain of youth, which if found, could make Master Ki young again, releasing Dang from his duties. But to find the fountain, Adam must go up against Echo who is trying to preserve the leaf monkey habitat.
Mr. Finale (2)
E28
Mr. Finale (2)While Adam and Derby explore a hidden, underground temple in search of the fountain of youth, Tater helps Echo learn about monkey behavior, and Ivy helps Slab prepare for his first ever cover model photo shoot. All roads lead to a confrontation with a local fancy hat factory owner, who has been keeping a secret from the villagers for generations. In the end, Adam gets the gang back to Finnegan, just in time for graduation.