1The Kids
Gumball and Darwin's voices may be breaking, but they're showing no signs of growing up. Whilst Gumball and Darwin make fun of Mom and Dad for being old, their voices start to break. They try to ignore it, but everybody they meet reacts to their new and unpredictable voices.
2The Fan
New Elmore Junior High student Sarah becomes Gumball and Darwin's obsessive number-one fan.
3The Coach
The new coach at Elmore High stands up to Jamie. The new Coach witnesses Jamie bullying the other kids at lunch and steps in. Jamie is made to apologize, much to the amazement of the other kids. Gumball and Darwin worry about Jamie seeking revenge, especially when they see her sneaking into the back of Coach's car.
4The Joy
When Miss Simian sees Gumball and Darwin joyful on Monday, she knows that something is wrong with them. She performs tests on them, but the nurse disapproves what she's doing. But suddenly, Gumball and Darwin start to infect the school with the 'Joy Virus', and it's up to Miss Simian and her tape player to cure the students.
5The Puppy
The Watterson children's long-awaited pet puppy turns out to be a turtle which hates them.
6The Recipe
Gumball and Darwin discover the secret behind their classmate Anton's immortality.
7The Name
When Mom reveals that Gumball's real name is "Zach," Gumball adopts a cheesy, annoying persona to match the name. His family tries to make him remember the old Gumball, as this new Zach persona is progressively taking over Gumball's life and erasing his memories.
8The Extras
Skits about the random extra characters seen throughout the series.
9The Gripes
When Gumball and Darwin begin to complain about every little thing in their lives, the people of Elmore City mistakenly assumes charity cases and put together a benefit to raise money for them, leaving them having to fix the mix-up.
10The Vacation
While driving to a campground, Nicole tells a horror story, which slowly starts to come true as their car breaks down and a stranger comes to help them out.
11The Fraud
Gumball and Darwin discover Principal Brown's diploma is fake, and Principal Brown is determined to keep their discovery a secret.
12The Void
When Gumball and Darwin investigate a missing classmate, they discover a far greater mystery... about Elmore.
13The Boss
Mr. Robinson has a stress attack and needs a stuffing transfusion from his son Rocky the janitor. He won't take it unless Rocky gets a better job in life. Rocky gets one with Chanax, where he becomes a work drone. Gumball and Darwin now need to get Rocky's soul back from his boss in order to get him to surgery.
14The Move
Clayton, a compulsive liar tells Gumball and Darwin about his awesome martial arts move, and discover that he wasn't lying.
15The Law
Doughnut Cop shows Gumball and Darwin that the smallest misdemeanor can lead to a breakdown in law.
16The Allergy
Gumball needs to find a cure for Darwin's allergy before he sneezes Elmore off the map.
17The Mothers
It's Mother's Day and kids put their moms through a series of tests to determine who has the World's Greatest Mom.
18The Password
Gumball and Darwin are shocked to discover that Anais is Dad's favorite child.
19The Procrastinators
Gumball and Darwin spend the day doing other things instead of taking out the trash like their mother told them to do before she got back home.
20The Shell
Gumball inadvertently cracks open Penny's shell, and discovers who she really is inside...
21The Burden
Gumball and Darwin are left in charge of the class pet hamster, Chris Morris, but they end up leaving it at school over the weekend.
22The Bros
Darwin becomes jealous of Gumball and Penny's new relationship and sets out to find information that will break them up.
23The Mirror
Gumball refuses to forward an e-mail purportedly sent by a ghost, against Darwin's advice. When a curse begins to take effect and their family is dragged into another dimension, Gumball and Darwin seek Carrie's help to save them.
24The Man
After Granny Jojo brings her new boyfriend to dinner at the Watterson household, Richard forbids her from seeing the boyfriend again.
25The Pizza
The Wattersons have had a bad day, but it turns out Larry has too and it's about to get worse... for everyone!
26The Lie
Noticing that everyone is in the doldrums of January, Gumball and Anais invent a new holiday to spark excitement.
27The Butterfly
When a Butterfly emerges from its chrysalis Gumball and Darwin want to release it. Miss Simian warns them about the butterfly effect. Gumball releases it anyways, and a domino effect causes chaos throughout the city.
28The Question
Gumball and Darwin try to figure out the meaning of life after coming down from a sugar rush.
29The Saint
After failing at making Alan lose his temper, Gumball and Darwin decide to adopt Alan's positive attitude.
30The Friend
Gumball and Darwin help Anais make up an imaginary friend who turns out to be all too real.
31The Oracle
After discovering a prophetic painting depicting Gumball's naked run through the mall, he is determined to avoid that outcome.
32The Safety
Darwin becomes obsessed with safety after seeing a video in class.
33The Society
Gumball is convinced there is a Secret Society in school, and he wants in.
34The Spoiler
When Gumball and Darwin have to wait to see a movie, they must go an entire week without someone spoiling the plot.
35The Countdown
Miss Simian threatens to expel the boys if they are late for school, so they race a clock in order to arrive on time.
36The Nobody
Gumball and Darwin investigate the disappearance of the family's stuff only to find out some stranger is living in the house with them.
37The Downer
When Gumball's family tries to cheer him out of an inexplicable lousy mood, he wishes they would all disappear.
38The Egg
Nicole wants to show to Felicity that the Wattersons are a normal family, while her son, Billy, meets Anais.
39The Triangle
Gumball grows jealous of Darwin's new talent.
40The Money
The Wattersons become poor when Richard loses all their money.