In this lighthearted comedy, Bill Cosby played the role of Chet Kincaid, physical education teacher at a Los Angeles high school. He was a bachelor, an average cool guy trying to earn a living, and help people out along the way. Many of the episodes involved Chet in various situations at the high school with his students and fellow teachers. In some episodes, Chet was asked to substitute, and fill in as algebra or english teacher. In one hilarious episode, Chet was the drivers ed instructor trying to teach a nervous student how to drive. Other episodes involved younger children, and some episodes involved family and adult characters.