When Leonard does experiments where he needs to use a laser only available during the night, he is unable to drive Sheldon to and from work in the morning. Sheldon, who can’t drive, seeks help from Penny, Howard and Koothrappali, but they all get so angry they refuse to drive him. However, the only way for them to get Sheldon off their back is to get him driving a car, which he’s terrible at, leaving the guys and Penny between a rock and a hard place.