Lewis passed away in Los Angeles on 30 October (10).
He began his career as a producer on U.S. TV series The Doctors and the Nurses and eventually moved on to write popular programmes including The Streets of San Francisco, Barnaby Jones, Baretta, Hawaii Five-O and In the Heat of the Night.
In 1978, he joined the production team behind hit series Dallas, first serving as executive story editor and then supervising producer, working on the series' famous Who Shot J.R.? episode in 1980 - the highest-rated TV episode in history at the time.
Lewis also wrote 1990s TV films Dallas: J.R. Returns and Dallas: War of the Ewings.
He is survived by his wife, Marjorie Estelle, a son, a brother, a granddaughter, a great-granddaughter and a step-son.