Feeding our need for speed, "Great Cars" takes in an in-depth ride with four classic automotive makes: the stately Buick, the powerful Oldsmobile, the youth-oriented Pontiac GTO and Henry Leland's risky luxury brand, Cadillac. From Pontiac's development of the first true muscle car to the resiliency of the Cadillac line, fans of the horseless carriage will find much to marvel at with these episodes that celebrate America's love affair with cars.