First season on DVD and streaming on Netflix.

As procedural premises go, Luther’s is ridiculous but memorable. In the first episode, unstable police detective John Luther (Idris Elba) is interviewing Alice Morgan (Ruth Wilson), a young woman whose parents have just been murdered, when he suddenly intuits that she is the killer. He’s not sure how she pulled it off, though, and by the time he figures it out, the evidence has been destroyed and he can’t prove it. But he knows, and he makes sure she knows he knows, which delights her because she enjoys having an audience to her evil genius. And from there, over the course of the short six-episode season, they develop a deeply weird relationship, like Clarice Starling and Hannibal Lecter but with significantly more sexual tension. Alice wants to make sure Luther remains a part of her life, so she begins offering unsolicited advice on cases, interfering in his relationship with his estranged wife, and complicating his already rocky career.

This is all pretty silly, and it only becomes sillier as it goes on. It’s difficult to believe that Luther would simply give up investigating Alice when a single piece of evidence—however key—is destroyed. It’s even more difficult to believe that their relationship could possibly be sustained as long as it is. Furthermore, Alice’s sociopathy tends to mutate according to the needs of individual episodes. It’s probably appropriate for her to be something of a cipher, but without some consistency, the character threatens to become merely a particularly entertaining plot device.

And yet, for all that, I rather like the BBC’s twisted little drama. The knotty storylines, with their hairpin turns, are darkly intriguing (if often rather gruesome), and the series convincingly cultivates a sense of true danger, offering absolutely no guarantees that everything will work out by episode’s end. Luther is brutally effective but effective nonetheless, and with its manic-depressive detective and friendly neighborhood sociopath at the center, it has a strange, loopy charm.