When does The Amazing World of Gumball: The Series return?

The Amazing World of Gumball (also known simply as Gumball or by its abbreviation TAWOG) is an animated sitcom created by Ben Bocquelet for Cartoon Network. The series concerns the lives of 12-year-old Gumball Watterson, an anthropomorphic blue cat, and adoptive goldfish brother Darwin, who attend middle school in the fictional city of Elmore, California. The show has received critical acclaim and developed a cult following, with particular praises for its extensive references to popular culture and internet culture, sarcasm, subtle innuendos, dark humor, and metahumor.
The series revolves around the life of a 12-year-old cat named Gumball Watterson and his frequent shenanigans in the fictional American city of Elmore. Gumball attends school with his siblings at Elmore Junior High, where throughout the series he interacts with his various middle school classmates, most prominently his love interest Penny Fitzgerald. Rob is a background character from the first two seasons who became trapped in The Void after becoming "irrelevant" in season 3, after which he becomes Gumball's nemesis.