This article contains spoilers. 3/5 stars Lead cast: Jung Eun-ji, Lee Jung-eun, Choi Jin-hyuk Latest Nielsen rating: 11.7 per cent The narrative of the newly concluded K-drama hit Miss Night and Day in some ways called to mind Robert Louis Stevenson’s classic horror tale The Strange Case of Dr Jekyll and Mr Hyde .

However, despite their different appearances, Mi-jin and Sun are exactly the same person – their behaviour does not change. The show’s Jekyll and Hyde aspect was the seesawing between its lighter workplace drama, romantic comedy and family elements and its darker serial killer investigation tropes. In Stevenson’s classic horror fable, the gentle Jekyll’s sudden transformation starts off as manageable but later becomes chaotic, as the manic Hyde begins to take over.

Miss Night and Day introduced the mystery of a series of present-day murders and past disappearances early on. When Mi-jin was young, her beloved aunt Lim Sun – whose name she borrows for her alter ago – disappeared without a trace. For much of the series, this investigation took place on the sidelines, with the centrefield action squarely focused on the show’s lighter attributes.

However, there is a hint early on that Mi-jin’s transformation is connected to Lim Sun’s disappearance. Indeed, we soon learn that Mi-jin’s daytime alter ego looks the way her aunt would look were she alive today. Thus an escalation of the show’s serial killer investigation was inevitable.

However, just l.