You could accurately say Elementary‘s version of New York City is a great cesspool into which all the killers of the country are irresistibly drained. Someone’s always being murdered. But Martin Ennis (Terry Kinney), the villain in the special episode that will air on CBS after the Super Bowl this Sunday is particularly nasty. For one, he escapes from prison during a medical procedure to give his ailing sister a kidney, just to go on a killing spree.

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• Jonny Lee Miller
• Kari Matchett
• Lucy Liu
• Terry Kinney
• Elementary