Gumball and Darwin are left in charge of Elmore Junior High's pet hamster, Chris Morris, over the weekend and come to appreciate its presence for different reasons – Gumball uses it to impress Penny on a date, while Darwin sees it as a listener to vent out his personal problems about Gumball and Penny, but when they discover that the hamster is a clump of hair from Principal Brown, the duo go to school to retrieve Chris Morris.