Since I am writing this review after only watching one episode, let me focus not on the overall quality but the on the impression it left me.

Being a fan of US criminal investigation dramas, one thing that has always fascinated me in their stories is how the truth of the crime is slowly unfolded by the time the culprit is caught. It takes a criminal's mind to figure out a criminal's mind.

Solely focusing on the evidences 'per se' to solve a crime is like holding a bunch of puzzle pieces, spreading them out without order, trying to find context clues here and there and just "guessing" what the picture is. And being convinced right away that what you "picture out" is the whole picture. And anything that contradicts that picture in one's head is a lie. Stupid, isn't it?

One thing that stands out in the first episode of Through The Darkness is that, in the way Ha Young's story is presented, the viewer is also able to enter into his mind (to be more accurate, the Tagalog word 'kalooban' is more apt to use here; a term which pertains what's inside a person's mind AND heart). And so as the episode progresses, the viewer is also able to enter into the thoughts of the lead character and begin to ask the same questions that he has.

It takes a criminal's mind—understanding their thought processes, making sense of their motives and behavioral patterns—to figure out a criminal's mind.

Those who are willing to enter a criminal's mind I invite to join Ha Young and his team as they explore through the darkness... Let us watch it until the end.

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Edit: I make this after watching the tenth episode and let me tell you, each episode DELIVERS. Kim Nam Gil's stellar acting skills consistently draws you in and makes you travel further deeper into each criminal's mind. You may find yourself getting mentally exhausted and you may also get worried that Song Ha Young might also get into deeper trouble dealing with those lunatics. That goes to show that the actors playing the criminals are doing a great job as well.