From The Perry Mason TV Show Book (Revised)
This episode features Billy Mumy, known to most fans as the know-it-all kid in Lost in Space. Mumy also starred in “Bang, You’re Dead,” one of the most memorable episodes of another classic TV show, Alfred Hitchcock Presents. His role in this Mason episode is remarkably similar to his Hitchcock appearance. As eight-year-old Miles Jefferson, Mumy finds a gun belonging to his uncle. He hides it, not knowing it is the key to a homicide case and is the only evidence that can get his Aunt Sylvia freed from a murder charge.