The best of the baddies.
Milverton in a 1904 illustration.
By Arthur Conan Doyle
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Flambeau in the Father Brown TV series.
By G. K. Chesterton
Gutman in the 1941 movie adaptation.
By Dashiell Hammett
By Rex Stout
Strange in Agatha Christie's Marple.
By Agatha Christie
Bruno in the 1951 movie adaptation.
By Patricia Highsmith
By Margery Allingham
By Ed McBain