The Traitor

"The Traitor" is the nineteenth episode of Season 4 of The Amazing World of Gumball. It is the 135th episode overall.

Synopsis
When Alan ditches Gumball to do something more fun, Gumball is desperate to track him down, taking revenge and make him pay for his betrayal.

Plot
The episode begins with Gumball combing his hair and pulls his face upwards. He enters the kitchen and makes a huge sandwich with numerous ingredients for dinner. He cooks it in the oven, and then less than a minute he takes out the oven and sets the dinner on the table. He then sprinkles petals out the front door.

Darwin asks Gumball if Penny was coming over, and Gumball states that Alan is coming over for dinner.

Darwin states to Gumball about what happened last time, and a flashback appears, Gumball and several classmates in the classroom during the Secret Santa event. Gumball gave Alan some gloves for a gift, while Alan gave Gumball a brand new video game. Gumball then angrily tosses the gift out the window, and attacks Alan when he apologizes while Darwin and several students hold him back.

Gumball then gets a phone call from the Keanes say that Jessica is sick.

While Gumball and Darwin were on the sofa with the laptop, Alan and his parents drove past Gumball's house. Feeling angry and betrayed, Gumball states that Alan lied about his mom in order to get out of dinner and calls him a traitor. Gumball and Darwin decide to get revenge on Alan and track him down.

The first clue was Joyful Burger, examining the first clue. The second clue was the theater, where Gumball tries to capture Alan, but unknowingly captures Billy instead, and the whole audience gasps at them angrily, and he and Darwin were thrown out of the theater. The third clue was the pond, asking several ducks about where is Alan.

As Gumball and Darwin continue to walk down the street, the Keanes' car drove past them again. Gumball angrily follows them in hot pursuit.

The two boys got to the hospital to confront Alan. Alan states that why they were at the hospital because his mom was sick and needed an organ transplant.

Gumball and Darwin removed an organ from Alan's body and it was given to his mom.

Main Characters

 * Gumball
 * Darwin
 * Alan

Supporting Characters

 * Dexter
 * Jessica

Minor Characters

 * Evil Turtle
 * Penny (mentioned)
 * Santa Claus (mentioned)
 * Masami
 * Leslie
 * Anais (cameo)
 * Larry
 * Mr. Corneille
 * Jackie
 * Harold
 * Hot Dog Guy
 * Crocodile Woman
 * Melted Cheese Guy
 * Green Bear
 * Louie
 * Exercise Bacon
 * Felicity
 * Billy
 * Patrick
 * Marvin
 * Neck Beard
 * Cowboy
 * Karen
 * Gary
 * Hexagon Lady
 * Clipboard Man
 * Goblin
 * Mr. Pepperoni
 * Siciliana
 * Librarian
 * Cupcake Woman
 * Jeff
 * Susan
 * Eggman
 * Charlie
 * Shape People
 * Hank
 * Carmen's father
 * Sphere Citizens
 * Orange Guards
 * Green Security Guard
 * Ducks
 * Sausage Dog
 * Pantsbully
 * Bomb Guy
 * Uncle Phil
 * Hamburger Cop (cameo)
 * Sarah (cameo)
 * Richard (cameo)
 * Rocky (cameo)
 * Bandage Doctor

Trivia

 * This episode was released on the Cartoon Network App and Video on Demand before it aired on TV on December 28, 2015.
 * This episode reveals that Alan's father, Dexter, is a surgeon.
 * It is revealed in this episode that Alan has an uncle named Phil.
 * It is revealed that Alan's parents, Dexter and Jessica met for the first time at Joyful Burger.
 * This is Melted Cheese Guy's first speaking role in an episode.

Continuity

 * "It's Christmas Eve" plays during the part when Gumball attacks Alan for giving him gloves.
 * This is Alan's fourth major role in an episode. The first three episodes were "The Photo," "The Storm," and "The Saint."

Cultural References

 * The way Gumball cooks dinner is similar to such shown on the YouTube comedy channel HowToBasic's videos.
 * The Melted Cheese Guy making his one-liner with his sunglasses is a reference to the opening scenes of CSI: Miami, where the character Lt. Horatio Caine delivers his one-liners before putting on sunglasses.
 * The way the characters (except Bomb Guy) explode when Gumball runs into them while he chases Alan in super speed is a reference to the Metroid series when the main character gets an ability with the same feature.
 * In the Polish version of this episode Gumball asks "Ktoś coś ?" (loose translation: "Anybody anything ?") which is very popular modern Polish phrase used on Internet forums and Facebook trading groups.
 * The music that plays in the scene when Gumball and Darwin are "performing surgery" (while actually making a sandwich) and the fact that one of the "surgeons" lost his watch are both references to the Surgeon Simulator game.

Goofs/Errors

 * On Gumball's first flashback, Masami, Leslie and Darwin were behind Gumball. On the second flashback, Carmen replaced Masami in the scene they were trying to hold Gumball from Alan.
 * On Gumball's first flashback, he said that he bought fingerless gloves, but the package clearly shows that it isn't fingerless.
 * When Gumball and Darwin were viewing a photo of Alan's family in a car passing by the Wattersons' house, it is shown in the background that they are viewing the photo before it was published on Elmore Plus.
 * When Alan and his parents went inside the elevator, Dexter's mustache was missing.
 * When Darwin gives Alan CPR, he makes a flatulence sound each time he pounds him. But once Darwin stops, the sound continues for two more seconds.
 * Alan's face looks like Tom Holland at the hospital yelling.