A psychopath's ruthless serial murders have left the entire nation gripped by fear and chaos. An honest, justice-seeking rookie police officer and a veteran detective with a tragic past, face off against the killer. After their encounter with the psychopath, their lives change completely.
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Lee Seung-gi
Jung Ba-reum
Lee Hee-jun
Go Moo-chi
Park Ju-hyun
Oh Bong-yi
Kwon Hwa-woon
Sung Yo-han
Gyeong Su-jin
Choi Hong-ju
Woo Ji-hyun
Koo Dong-koo
Jo Jae-yun
Daniel Lee
Kim Young-jae
Go Moo-won
Hwang Se-on
Kim Da-seul
All 20 episodes plotted by IMDb rating
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20 episodes • 2021Avg: 8.2Golden Era
| # | Episode | Air Date | Rating |
|---|---|---|---|
| 1 | The Head Hunter | Mar 3, 2021 | 7.7 |
| 2 | Eye for an Eye | Mar 4, 2021 | 7.5 |
| 3 | Resurfacing Murder Cases | Mar 10, 2021 | 8.2 |
| 4 | Who Are You? | Mar 11, 2021 | 8.0 |
| 5 | The Live Broadcast | Mar 17, 2021 | 8.9 |
| 6 | The Donkey and the Goat | Mar 18, 2021 | 8.2 |
| 7 | Memory Loss | Mar 24, 2021 | 8.0 |
| 8 | Ba-reum's Memories | Mar 25, 2021 | 8.2 |
| 9 | Ba-reum's Brain | Mar 31, 2021 | 8.0 |
| 10 | Sung Yo-han in Me | Apr 1, 2021 | 8.0 |
| 11 | Kill Him! Kill Her! | Apr 8, 2021 | 8.5 |
| 12 | The Yo-han in Ba-reum | Apr 14, 2021 | 8.3 |
| 13 | DNA on the Weapon | Apr 15, 2021 | 7.3 |
| 14 | The Cat Killer | Apr 21, 2021 | 8.5 |
| 15 | It Was All Me! | Apr 22, 2021 | 8.5 |
| 16 | Was It Really Sung Yo-han? | May 5, 2021 | 8.0 |
| 17 | The Guryeong Family Massacre | May 6, 2021 | 8.0 |
| 18 | Please, Give Me Some Time | May 12, 2021 | 8.5 |
| 19 | Kim Joon-sung's Laptop | May 13, 2021 | 8.5 |
| 20 | Ba-reum's Final Call | May 19, 2021 | 8.6 |
