The series centers around the quirky and diverse Smith family and their three housemates. The family includes Stan Smith, the father, husband, and primary provider; Francine Smith, his devoted wife; their daughter Hayley, who is in college; and their son Steve, who is in high school. Beyond the immediate family, there are three other key characters: Hayley’s boyfriend-turned-husband, Jeff Fischer; Klaus, the family pet who is a man trapped in a goldfish’s body; and the standout character, Roger, an eccentric alien known for his disguises, audacity, and outrageous behavior.