The Wednesday-Thursday mystery series “The Ghost Detective” continues to give viewers the chills.

Starting with the shocking revelation just four episodes in that protagonist Lee Da-il is really a ghost, here are some of the best moments in the fast-paced show.

(KBS)

When Lee Da-il turned out to be a ghost (from episode 4)

During the fourth episode, viewers saw Lee Da-il’s hand pass through someone else’s as he tried in vain to save a man from suicide.

Fortunately, Lee’s assistant, Jung Yeo-wool, managed to save her sister’s former manager by extending her hand in time.

Jung told Lee that he could not touch people because he was dead -- revealing for the first time on the show that Lee is a ghost, and that Jung has known about it all along.

The “conversation with the mirror” scene (from episode 2)

During the second episode, Lee Chan-mi, played by actress Mi Ram, spoke to her reflection in the mirror, which took on a life of its own and encouraged Lee to kill a boss who had fired her unjustly.

“You thought about murder every night,” Lee’s reflection said. The scene sent chills down viewers’ spines.

When Jung Yi-rang’s killer is confronted by his son (from episode 4)

When Jung Yeo-wool sent out texts to all the people who were at the restaurant where her younger sister Yi-rang died, it shocked her sister’s former manager, who was driving when he received the text.

The manager’s son, sitting next to him in the car, asked, “Dad, I’m curious. Why did you kill the woman? Everyone knows you killed her -- except you?”

The innocent look on the child’s face when he confronted his murderous dad gave viewers goosebumps while satisfying our sense of justice too.

“The Ghost Detective” airs at 10 p.m. every Wednesday and Thursday on KBS2.

By Yim Hyun-su (hyunsu@heraldcorp.com)