How do you feel about nightmares? Pretty solid? OK, go ahead and check out the gruesome trailer for Those Who Kill, A&E's new cop series starring Chloë Sevigny  and James D'Arcy. Those who caught Sevigny on American Horror Story: Asylum  are used to seeing the actress in harrowing situations, but this time she has a gun. She's playing Catherine Jensen, a tough cop with a chip on her shoulder about her long-disappeared brother. The show looks fantastic, though it's certainly not for the lighthearted. The Pittsburgh-set cop series premieres on A&E on March 3. Will you watch, or are you maxed out on dark, murder-y shows?