The Third
Gumball and Darwin grow bored of one another and seek out a third friend to make their lives more exciting.
The Responsible
Gumball and Darwin get to babysit Anais whilst their parents go to a PTA meeting but being "responsible" has a different meaning when you don't know what it means.
The DVD
An overdue DVD causes chaos (and a hefty fee) for Gumball and Darwin.
The 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.