When Bob has an accident, the kids must take care of him and Charlie while avoiding their mother.

Amy reveals that she was Wammy the Ram, the mascot of Teddy's high school, and pressures her into trying out for the role too. Teddy tries to blow the audition but gets the role anyway, just in time for the big rivalry game. Meanwhile, PJ challenges his best friend Emmett to baby-race his nephew against Charlie.

A backwards dance is approaching at Teddy's school. Teddy asks Spencer out for the big night and Ivy asks out Emmet. Teddy tries to get her first kiss from Spencer, but he's busy hanging out with Emmet. Meanwhile, Gabe tries to get his parents to argue at Open House because he has been lying to his teacher and saying that he could not complete his assignments because his parents are fighting.

The Duncan's are quick to blame P.J. after they return home to find all of their party decorations destroyed, but P.J. insists that Charlie is the real culprit.

A puzzled P.J. and Teddy cannot understand why their friends are angry with them, until the monthly cell phone bill arrives.

PJ meets a girl who has an unexpected link to Bob. Emmett is upset that PJ isn't prioritising him. Gabe is bullied by a girl at school.

Spencer decides to help Teddy with her dance routine for the school talent show, but when he realizes she is terrible he fakes an injury to get out of it. Meanwhile, Jo convinces Gabe that she will help him win the class president election but instead she purposely sabotages him and runs for election herself.

Gabe is left in charge of Charlie while doing a school assignment with Jo. Meanwhile, Teddy accompanies a scared PJ to the dentist and Bob surprises Amy with a spa getaway.

A new kid on the block named Austin (Nathan Gamble) who Gabe is forced to become friends with develops a crush on Teddy. She uses the crush to her advantage to make Spencer jealous, who has already gotten a new girlfriend. Meanwhile, Bob temporarily fills in as a member of PJ's band after Charlie gets their newest member sick.

Gabe tricks Amy and Bob into getting him a new bike.

Teddy and PJ throw a house party while Bob and Amy are on a romantic date. Meanwhile, Amy forces Gabe to accompany Jo to cotillion classes.

Teddy and Skyler compete against PJ, Spencer and Emmett in the annual battle of the bands competition at the mall. Teddy then finds out that Skyler and PJ are dating and neither of them want to do the competition any more. Meanwhile, Bob asks Gabe to take a gift back to a rich boy in his class. When Bob goes to the boy's house to return Gabe's gift, he goes back on his word and befriends the boy's father. Also, Amy takes credit for a painting done by Charlie after her art teacher says she has no real talent and that Charlie's painting is a work of art.

After accidentally breaking the one and only record made by Bob's old band, PJ gets the Bob Duncan Experience back together. PJ also learns the real reason why the band broke up. Meanwhile, Emmett proves to Teddy that she had promised to be his date to the Homecoming Dance in elementary school, so Teddy tries to hook him up with Alicia (Kiersey Clemons), the new girl in school. Gabe and his friend Leo (Rico Rodriguez) make a lemonade stand, but split up and compete for business after a falling-out over the profits.

When the Duncans take a family trip to Super Adventure Land, Gabe and Amy get offered a job to be in a commercial, but when they receive the script, Amy is upset that Gabe gets most of the lines and she only gets one, so she makes a few tweaks to the script. Meanwhile, Emmett gives Teddy a job at Super Adventure Land so she could save up for a new car, but soon she discovers that the job Emmett got her is to portray the princess in the classic fairy tale The Princess & The Frog and Emmett is the frog. Also, Bob is so pleased with P.J.'s cooking that he would do anything to get more even doing his homework for him.

Teddy becomes nervous when she has to kiss Spencer at her job at Super Adventure Land. When they kiss, Teddy begins to have feelings for Spencer again. PJ learns that Bob mistakenly wrote his name wrong on his birth certificate. Gabe has a hard time finding a birthday gift for PJ.

Bob and Amy vote on baby names. Teddy looks for peace and quiet to do her work. PJ is graduating from high school but feels he might fail; Gabe thinks he did something wrong when Bob and Amy give him extra attention.

Ivy's dad opens a weather-themed restaurant where Teddy and Ivy become waitresses. Gabe has a crush on a girl and Amy tries to show her Gabe's "soft" side. PJ and Emmett have a rematch on the baby race, this time on tricycles.

Once again, things go awry for Teddy when she tries to win over Spencer’s mom. Amy has mixed feelings when PJ and Emmett get an apartment together. Gabe discovers Bob has a hard time letting go of the past.

Teddy takes her volleyball coach’s advice to be more aggressive a little too seriously. Bob finds solace at PJ’s new apartment, and Amy unknowingly builds Gabe’s model rocket science project.

A bat invades the Duncan house on Halloween; Teddy and Spencer celebrate their 1-year anniversary; Gabe gets tricked by Mrs. Dabney into attending a ceremony in honor of her charitable work.

Amy uses her maiden name to work as a nurse at Gabes' school so he won't be embarrassed. Teddy and Vonnie team-up for a school project. PJ and Emmett start a baby-sitting service.

Starting from where the season 3 finale left off, the Duncans' house has been destroyed by termites and they must build a new one, with the help of The Muppets.

Teddy throws a sleepover at PJ's apartment to forget about her anniversary with Spencer, while PJ and Emmett take care of their neighbor's pet rats while he's away. After Verne quits working for Bob to start his extermination business, Bob hires a young man named Beau (Luke Benward), as a replacement. Amy and Ms. Dabney use Gabe and Lauren to trick each other to do their chores but tables turn when Gabe and Lauren find out.

Beau gets a job offer and must decide whether to stay in Denver with Teddy or move back to Tennessee.

Gabe discovers PJ has been living in the tree house in the backyard.

Teddy leaves for college and the family has a hard time saying goodbye.