Freckled, all-American racecar driver Tom Slick (voiced by Bill Scott using a voice similar to Dudley Do-Right) competes in various races with his trusty vehicle, the Thunderbolt Grease-Slapper. He is accompanied by his girlfriend Marigold (voiced by June Foray) and his elderly mechanic Gertie Growler (also voiced by Bill Scott in the manner of Jonathan Winters 'Maude Fricket'). The two women do not always get along well. A recurring antagonist is the evil Baron Otto Matic (voiced by Paul Frees), and the Baron's stupid lackey Clutcher (voiced by Daws Butler impersonating Frank Fontaine), whom the Baron had a penchant for hitting across the head with a monkey wrench. Seventeen six-minute episodes were made.