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Idris Elba returns as John Luther in the latest season of BBC America's British drama.
In "The Calling" creator Neil Cross offers a gripping exploration of the troubled detective's backstory
The "Luther" star says he'd definitely consider taking on the spy role if Sony offered it to him.
A police procedural with a black British detective in the lead will seem exotic to many American viewers, but "Luther" is -- finally! -- a cop show devoted to the investigation and to the characters…