I thought the series got off to a sluggish start-the wife of a police officer is stalked and killed by a smooth-talking, elegant killer armed with a sort of ball peen hammer and the story drags while the officer grieves. Then, the authorities think they have the culprit, but another (female) officer-a call centre operative-claims the voice of the suspect does NOT match her recollection. Thus, we encounter the unique 'hitch' of this show: this girl has amazing hearing, a skill she has developed diligently. As work begins on other cases, this 'gift' plays a big part, and we suspect one day, she will identify the voice of our mysterious serial killer with the 'slugging device'.
The series contains forensic errors, and some unexplained plot elements, which savvy viewers in the Western Hemisphere will detect easily, but the gifted call Center Officer & the cop with the murdered wife, and their new team, combine for suspenseful episodes, if you stick with it. This 'gifted faculty' thing is catching on: we have Monk with his obsessive-compulsive attention to details; Sniffer, a Russian crime series with a human bloodhound; and the defunct LIE To ME about a human lie detector. It all makes for fun if you suspend your belief a bit. It all started with Sherlock Holmes, you know, in Victorian England, and his gift of observation & deduction.
So, despite its faults, and some grisly moments when the mysterious killer strikes, we are going to wait this one out TIL our gifted girl nails the bad guy.