1. The Fourth Golden Time / New Emails

Kwon-ju gets an email from "Circus Man." Derek Jo chases a gangster in Korea. A woman calls 112, begging for help.

2. Where the Dogs of the Netherworld Live

Kwon-ju and Derek meet. The teams are shocked by the culprit's face. A call reports someone dragged into the woods.

3. Where the Dogs of the Netherworld Live, Part 2

Kwon-ju listens to Jang Ye-suk's plea. Derek finds clothes with bite marks and races against time to save her.

4. The Old Female Diver's Whistling Breath

The team searches for Gong Su-ji at the hospital. A diver threatens the village chief after seeing her granddaughter's body.

5. Running Away From Danger

Kwon-ju receives a Circus Man video. Go Ga-eun, kidnapped by a drug ring, tries to escape.

6. Episode 6

Circus Man is revealed to have multiple personalities. A caller reports someone trying to stab them.

7. 28 Years Later

Kang Suk-chun's secret is revealed. Derek learns the truth from 28 years ago. Han Woo-joo meets a suspicious stranger.

8. The Missing Teen

The team plans to arrest Circus Man. A teacher calls in panic -- one of their students has been kidnapped.

9. Obsession By a Lover

The team rushes to save Kwon Saet-byeol and Kang Hyo-joon. Derek uncovers Circus Man's secret. Kwon-ju meets him alone.

10. The Birth of Circus Man

Kwon-ju and Derek identify Circus Man. The team investigates Dong Bang-min. A figure in a black raincoat appears.

11. Kwak Man Taek's Confession

Kwak Man-taek confesses. Kwon-ju analyzes voices and uncovers a secret. Someone breaks into the team's base.

12. Sonang Village's Secret

Kwon-ju and Derek chase the intruder into the woods. A report comes in —- Kwon Saet-byul is missing.

13. Time of Judgement

The team discovers Dong Bang-min's plan and chases him to save Kwon Saet-byul. He plots to escape justice.

14. Judgement Hour

Dong Bang-min flees the hospital to a village. Kwon-ju’s psychic hearing ability is finally revealed.