The Strange Case of the Cosmic Rays is an examination of what cosmic rays are and how they work. It was written by Capra with Jonathan Latimer, a crime fiction novelist and screenwriter. As Gilbert describes it, the third and fourth films "repeated the formulas of his earlier work while ever searching for new contrivances for popularization as well as the best language to express his soft religious message" and that the script was essentially a reworking of ideas Capra had developed for a possible documentary about Robert A. Millikan. The film's screenplay works from the premise that the nature of cosmic rays is a mystery comparable to the great detective stories. A committee of marionettes representing Fyodor Dostoevsky, Charles Dickens, and Edgar Allan Poe is called upon to decide the question. The film was broadcast on October 25, 1957, apparently with a smaller television audience share and with more unfavorable reviews than for the first two specials.