Based partly on a popular Danish TV series, "The Killing" is a moody, character-driven detective procedural that weaves a murder mystery through a full season or more. The stories unfold through the eyes of Sarah Linden, a detective with the Seattle Police Department and who, at first, must mentor Detective Stephen Holder, a former narcotics cop. While their backgrounds produce investigative styles that clash -- she's by-the-book, he's freewheeling -- they manage to pull together for the case.