Hazel is a Screen Gems television series about a fictional live-in maid named Hazel Burke (Shirley Booth) and her employers, the Baxters. The five-season, 154-episode series aired in primetime from September 1961 until April 1966. The first four seasons aired on NBC, were sponsored by Ford Motor Company, which had earlier underwritten Tennessee Ernie Ford's comedy and variety show, The Ford Show. As a result, Ford vehicles, including the Mustang when it was introduced in 1964, were often prominently featured on the series, even as a part of the storyline (an example of product placement). During season four, Bristol-Myers co-sponsored Hazel. In the final season on CBS, Procter & Gamble and Philip Morris were the sponsors. The show was based on a popular single-panel comic strip by cartoonist Ted Key, which appeared in the Saturday Evening Post.