Just as 20th Century Fox successfully adapted Peyton Place into a very successful, twice-weekly primetime soap opera, the studio thought they could repeat that success by creating a series based on the movie, The Long, Hot Summer. Unfortunately, viewers didn't believe that was possible, and the show was cancelled after 1 season.
For one thing, it was packaged as a 1 hour drama, rather than a 1/2 hour, like Peyton, and while the two of them together were the forerunners of evening soaps to come (i.e. Dallas, Dynasty), it was still a novelty back in the day.
Stuart Fanning uploaded this sample package. Jimmie Rodgers sings the theme song.