Except that Harlan didn't write the screenplay for A Boy and His Dog, and if I recall correctly, did not really appreciate the ending gag. IMDB lists Psycho Boy and His Killer Dog as an alternate title. I wonder where that came came from?
Speaking of titles, I, Robot was originally the title of a collection of stories about Adam Link, robot, by Eando Binder. When Isaac expressed concern about his publisher's pilfering the title, the publisher basically said, "$#*& Eando Binder!" Titles are not protected by copyright, but story themes and wordings are.
"For shame, gentlemen, pack your evidence a little better against another time."
-- John Dryden, "The Vindication of The Duke of Guise" 1684