When 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!

Adam uses a time machine to go back in time so he can make a better first impression on Echo.

In 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.

In 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.

While taking Ivy on a tour of Great Northern University, Adam and his old professor tell Ivy about Adam's first day on campus.

A student takes credit for writing Adam's love letter to Echo and Adam must prove that the student is lying before Echo falls for the wrong guy.

When Echo decides she and Adam should set each other up on a double date, Adam must try to find a date who Echo won't fall for.

Ivy invites Echo to a slumber party at the Young house; Adam must now stop Echo from discovering a shrine that exposes his true feelings for her.

Time is accelerated after an experiment went wrong; Adam and Derby age.

Adam accidentally gets Santa Claus's elves fired and must work to get them rehired, or feel their pint-sized wrath.

Adam can't get peace and quiet so he buys his own apartment. Thing go wrong when everyone piles in for their own reason. So now, with the help of his mom, they try to get out of the lease. Meanwhile, Tater enlists that Dang help in fooling his new girlfriend Gwen that he's a billionaire living in a mansion. He ends up telling her the truth thinking that she'll like him better but she doesn't and she leaves. Adam ends up selling Tater his apartment.

The 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.

Arthur 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.

Adam tries to get his students to appreciate having a young teacher by pretending to be his own substitute, a cranky old man. The students apreciate his subsitute so much that Principal Tater fires Adam! Adam protests so Tater offers a 'teach-off' between the two. Can Adam be in both teachers at the same time?

The producer of the popular science-based TV show, "Science Schmeince" arrives at Finnegan, looking to hire Adam as the show's new host. Adam agrees, seeing this as a great opportunity to spread his love of science to a broad audience. But, when the producer grows bored of Adam's science-y technobabble, he hires Derby as the zanier host of the show.

Having had his career ruined by Derby, Preston Pickles takes a job as Finnegan High's new shop teacher. But while no one else will believe him, Derby is convinced that Preston is trying to get rid of him. Derby must find a way to restart Preston's career as an infomercial pitchman, or face the wrath of the Derbinator 3000.

After Adam finds out that Echo is taking her "little sister" to the school carnival, Adam signs up to be a "big brother"so they can spend the day together. Unfortunetly Echo's "little sister" starts stalking Derby while Adam's "little brother" spends a lot of time with Echo.

Adam is made faculty advisor for the school play "Romeo & Juliet", but when Tater casts Echo as Juliet, Adam tries to prevent her from kissing another Romeo.

Adam holds an overnight astronomy class in the quad, but finds himself competing for his students' attention with principal Tater, who treats it like a camping trip.Adam tries to trick the class into camping with him. Meanwille Ivy plays a horsing game with the janitor

Adam wants to be paired with Echo in a computer match-making fundraiser and will go to any lengths necessary to ensure his questionnaire answers match hers.

When Adam's mom sells his prized "Mr. Marvelous" comic book to Slab, Adam dresses up as the superhero in an attempt to get it back.

Adam believes that a professor has been nominated for a Nobel Prize, based on research he stole from Adam. When he and Derby break in to the professor’s office to search for proof and discover he’s blind, Adam convinces Derby to become a seeing-eye dog, and sniff out the evidence.

Cyclops Foods buys Finnegan High after it goes broke and tests new products on the students.

When no one is willing to sign up for the talent show, Mr. Tater offers a get out of detention free card as incentive to sign up. Because no one is getting detention, except for Derby, Tater starts to make new rules in order to give out detentions. When he sees Ivy texting in the hall, he tells her that there is a new rule against it. To avoid getting detention and having to sign up for the talent show, Ivy tries to use different forms of long distance communication, but Tater bans them all. Meanwhile, Adam convinces Echo to sing in the school talent show, but when he realizes she's a terrible singer, he tries to prevent her from taking the stage. Meanwhile, Derby searches for a talent to use in the show.

When Adam discovers that Slab is secretly taking ballet, he and Derby follow him to dance class hoping to blackmail him into behaving at school.

When Adam has trouble controlling his class, he creates a robot student, Arthur, to enforce the rules. When Mr. Tater finds out, he figuratively says that he is going to kill Adam. However, Arthur takes it literally and tries to destroy Tater, as one of his directives is to protect Adam. Adam and Derby must stop his creation, or he himself could be "terminated."

Adam learns that Echo is taking the same route home from school and is excited to walk with her. That is, until he learns he has detention duty and the only way to get out of it is to prevent anyone from getting in trouble...including Slab.

Adam becomes jealous when Derby accidentally invents a miracle hair growth formula. When someone wants to market his formula, Derby has to recreate it but can't remember what it was. Meanwhile, Ivy needs to pass her CPR course.