Teens PJ and Teddy and tween brother Gabe are typical kids -- that is, until their mother has another baby. The arrival of their new sister completely upends the entire household. When their mother heads back to work after Charlie's birth, it's up to the kids and their dad to keep the home fires burning -- and to keep Charlie out of trouble as she learns to sit up, crawl, walk and run. Teddy, as the older sister, makes a personalized video diary for Charlie, in each episode adding a nugget of wisdom for her baby sibling.
Episode 1
When Bob has an accident, the kids must take care of him and Charlie while avoiding their mother.
Episode 2
It's been a while since Amy and Bob have been on a date, so Teddy encourages them to go to dinner while the kids babysit Charlie. When PJ takes Charlie to the park, he accidentally swaps strollers and babies with a cute girl, Emma.
Episode 3
Gabe and PJ mistakenly believe something fishy is going on with their neighbor, Mrs. Dabney, so they investigate. Meanwhile, Teddy is annoyed that her best friend Ivy has become texting buddies with Amy.
Episode 4
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.
Episode 5
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.
Episode 6
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.
Episode 7
A puzzled P.J. and Teddy cannot understand why their friends are angry with them, until the monthly cell phone bill arrives.
Episode 8
The family reminisces about the day Charlie was born.
Episode 9
Teddy and P.J. hatch a plan to keep Bob from tearing down their cherished childhood tree house.
Episode 10
Teddy tries to strike up a friendship her Uncle Mel after Bob refuses to tell her why he wants nothing to do with him. P.J. and Gabe plan to turn Charlie into a model behind Amy's back.
Episode 11
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.
Episode 12
Gabe gets his first crush on a girl named Kit, he then lies to her so they can have something in common. Meanwhile, Mrs. Dabney asks Teddy to catsit her cat Kaboodle and Teddy thinks the cat is sick because she just lying around. PJ uses Charlie to make more money on deliveries by saying he is watching her while his mom at the hospital, not mentioning she actually works there.
Episode 13
Teddy tries warming up to her English teacher by having Charlie take part in her oral presentation on the book Animal Farm. Meanwhile, Gabe and his basketball team fire Bob as their coach and hire Amy instead, after winning their first game under her guidance. Also, PJ begins to spend way too much time with Amy's friends.
Episode 14
P.J.'s romance with Madison wreaks havoc on his friendship with Emmett as well as Bob and Amy marriage. Teddy agrees to help Gabe make peace with a bully at school.
Episode 15
PJ video tapes Charlie when she is being funny and puts the videos on the internet. Charlie becomes an over night super star getting tons of hits from the videos. When Amy and Bob find out, they don't like how Charlie is popular over the internet and they force PJ to take the videos down. After that, Charlie's fans get mad.
Episode 16
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.
Episode 17
Teddy needs money for a new cell phone and gets a job as the neighborhood dog walker, but the job is less than glamorous. After walking in PJ's job Kwikki Chikki, PJ gets jealous when his boss gives Teddy a job as the Kwikki Chikki spokesmodel. Teddy then comes up with a plan to get herself fired in order to give her brother the spotlight he deserves. Meanwhile, Amy sings a song with Charlie at her daycare which gets very competitive with the other mothers, while Gabe uses a mouse to play a trick on Bob.
Episode 18
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.
Episode 19
Gabe's friends come over for a sleepover. Meanwhile, Teddy prepares for an important role in school play and Charlie refuses to sleep in her first "big girl" bed.
Episode 20
Charlie bites Teddy's boyfriend, Spencer. Teddy then discovers that he has another girlfriend, Skylar (Samantha Boscarino) when she tries to smooth things out at Spencer's job. Skylar also finds out and she and Teddy dump Spencer. Meanwhile, Gabe treats PJ like a personal chauffeur because he lent PJ money to buy a car. PJ tells Gabe he could have the car because the car was supposedly haunted, but was just a scheme to scare Gabe into letting PJ have his car.
Episode 21
Teddy starts a rock band with Skylar and wrote a mean song about Spencer. Meanwhile, Gabe and PJ are tired of sharing the same room, so Gabe sleeps in an extra room in Mrs. Dabney's house. Amy uses the free day care at a gym to go to a spa down the street.
Episode 22
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.
Episode 23
Gabe tricks Amy and Bob into getting him a new bike.
Episode 24
The Duncans go on a family road trip to a ski resort in the mountains. While on the ski trip, Teddy meets a psychic who tells her that she will meet her true love during the vacation. She meets two guys, and her ex-boyfriend, Spencer. What will happen next?
Episode 25
Still on their family ski trip, Teddy asks Ivy to come meet her. Meanwhile, Bob buys Charlie a bear suit to keep her warm, but she refuses to take it off. Amy finds out that Bob andHer are not married after Bob tells her. Meanwhile, Gabe and PJ ice skate and have to do a move called "the cycle of awesomeness"
Episode 26
Teddy volunteers to drive Mrs. Dabney around to get more experience behind the wheel.
