Follow That Munster

S1 E23: Herman takes a correspondence course to become a private detective. He confides in Grandpa telling him that he is convinced he has the talent and ability to make his new career highly profitable. He means to apply for a full time job as a detective after getting sufficient practice in his new craft by following people at night. After Herman continues to stay away from home each night, Lily becomes convinced that he is having an affair with another woman.