S1, E26: After a violent argument while he is teaching her to drive, Darrin enrolls Samantha in a driving school. Basil Koenig assigns his brother-in-law Harold, one of humanity's leading nervous wrecks, to teach Samantha. Time after time, Samantha uses witchcraft to get the dual-controlled car out of catastrophic predicaments. Harold finally breaks when he hears Endora's voice from the back seat and is unable to see her. Harold leaves Samantha, Endora, and the car and heads for a psychiatrist. Feeling responsible, Samantha takes Darrin to the school to keep Harold from losing his job. Matters get more complicated when Darrin tries to explain Endora's unseen presence. Although Koenig has already fired Harold, he rehires him when Samantha threatens to go to another driving school. After Darrin learns Samantha has cured Harold's nervousness by getting him to join a class in basket weaving, Darrin decides to join, too.