Pole Position

The show features the Darretts, a family of stunt-driving crime fighters, who investigated and thwarted wrongdoing while operating under the front of a traveling show known as "Pole Position Stunt Show", which was sponsored by the United States government in order to give cover for their investigative activity and provide maintenance for the high-demand vehicles. The Darretts had two adult children and a third child who was much younger in age. (wiki)