Sumner Arthur Long (31 March 1921 – 6 January 1993) was an American playwright, screenwriter, and author.He wrote the comedy play Never Too Late. A film adaptation was released in 1965. Long began writing for television in 1951, and wrote many episodes of Lassie, “Father Knows Best,” “The Danny Thomas Show,” “Dobie Gillis,” and “The Donna Reed Show.” Source: Wikipedia (en)