John T. Dugan (October 11, 1920 â December 24, 1994) was an American screenwriter. He wrote for television programs, including Bonanza, Mr. Novak, 12 O'Clock High, Dr. Kildare, Adam-12, ', Ben Casey, ', Columbo and Little House on the Prairie. Dugan died in December 1994 of pancreatic cancer at his home in Encino, California, at the age of 74.
Dugan was twice nominated for the : in 1968, for the ' episode "Return to Tomorrow"; and in 1980, for the Little House on the Prairie episode "Second Spring".