Jack MendelsohnJack Mendelsohn.

Jack Mendelsohn (November 8, 1926, January 25, 2017) was an American writer-artist who worked in animation, comic strips and comic books. An Emmy-nominated television comedy writer and story editor, he had numerous credits as a TV scripter, including Rowan & Martin's Laugh-In, Three's Company, The Carol Burnett Show and Teenage Mutant Ninja Turtles. Among his work for feature films, he was a co-screenwriter of Yellow Submarine (1968).