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Molly Butler dies from carbon monoxide poisoning. The cops believe she either killed herself or it was an accident. But when Molly's best friend Judith Kent reads Molly's diary, she discovers that Silas Butler had written a mystery story for his writing class about using carbon monoxide to kill someone without getting caught.

CBS Radio Mystery Theater is a radio drama series created by Himan Brown that was broadcast on CBS Radio Network affiliates from 1974 to 1982, and later in the early 2000s was repeated by the NPR satellite feed. In New York City it was not aired by the then all-news WCBS but by its originating station, WOR, which produced and announced it as simply Radio Mystery Theater.

Wikipedia. CC BY-SA 4.0. Updated Jul 16, 2026.