Killer: Jack the Ripper? Modus operandi: Gutting with a knife is preferred, but the victims in London's East End meet all sorts of ghastly demises. Still at large? The real Jack the Ripper was never apprehended, and this series picks up six months after the killing of the Ripper's supposed final victim. The police (played by Jerome Flynn, left and Matthew MacFadyen) suspect the Ripper may be back.
Jonathan Hession / BBC America
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