Circuit is a member of the Turbo Team, six urban-operations Micromasters who can combine to form Sixturbo. The Turbo Team fight alongside the Guard City team and other Micromasters to protect the Earth from the forces of the mighty Decepticon führer Scrash. In an alternate-timeline/universe, Circuit, being a race car, is naturally the fastest member of the Turbo Team, and acts as a scout and a messenger. He's also dangerous on the road--he's not bad at driving, just really excitable. This drives Road Police crazy. Also, he says he can talk to the wind. Nobody's quite sure what to make of this.