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Having escaped from a mental institution, Evelyn Forbes (Ann Rutherford) is the primary suspect in the murder of her ex-husband Arthur Cartwright (Robert Ellenstein). Things get worse for Evelyn when another person is killed, as well as a strange dog that has been howling nonstop throughout the proceedings. Perry Mason (Raymond Burr) sets about to save Evelyn's life, even though the evidence against her is overwhelming. This episode is based on a novel by Erle Stanley Gardner, which was previously adapted as a 1934 theatrical feature starring Warren William as Mason (in the movie, it is implied that the heroine is actually guilty, but Perry manages to get her off in the spirit of "justifiable homicide"!)