A comparison of the 1937 book, Dumb Witness, to its 1996 TV adaptation. Uncaptioned clips are from: Poirot: The Adventure of Johnnie Waverly (1989) Hickory Dickory Dock (1995) Wishbone, Season 1, Episode 8: "Slobbery Hound" Doctor Who, Season 3, Episode 9: "The Family of Blood"
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