Sarah Peterson's only appearance was in the Season Seven episode, "Lil' Crime Stoppers". In that episode, she seeks help from the boys, who were playing detective, to find her lost doll. They find the doll in Fosse's house, where Bill and Fosse are playing with it. The boys go in and retrieve the doll, and return it to Sarah later. Her mom is so appreciative she advises the Park County Police department of their heroism.
Sarah has long orange hair with yellow ribbons tied in bows to give her pigtails. She wears a yellow dress with green and white trimming. She also wears black shoes and a white skirt.