This was meant to be the series finale. The episode ends with Betty Jo and Steve announcing that they're having another baby. At the last minute, CBS decided to renew the series for a seventh season because it would give the series five full seasons of color episodes for syndication, which would be very profitable for the network. When the show returned for its seventh and final season in September 1969, the storyline involving Betty Jo's pregnancy was dropped and never referred to again.
In the opening scene, Betty Jo and Steve sing "No Two People" by Frank Loesser, from the film Hans Christian Anderson, while Billie Jo accompanies them on the piano. The logo for How to Succeed in Business Without Really Trying, another Frank Loesser score, can be seen on the back cover of the sheet music on the piano.