Psychopath Diary (Korean: 싸이코패스 다이어리) is a 2019 South Korean television series starring Yoon Shi-yoon, Jung In-sun and Park Sung-hoon. It aired on tvN from November 20, 2019, to January 9, 2020.
Synopsis
Yook Dong-sik (Yoon Shi-yoon), an analyst who works at Daehan Securities, has a timid personality. He can't even get angry at the people who look down upon him. One day, shortly after failing on his attempt of suicide, he witnesses a murder. He unintentionally picks up a diary belonging to the murderer, on which was written the log of his murders. He flees with the diary, but he is accidentally hit by Police Officer Shim Bo-kyung's (Jung In-sun) patrol car which causes him to suffer from retrograde amnesia. Due to the diary in his possession, Dong-sik mistakenly believes he is a psychopath. Since that moment, his behavior started to change. Bo-kyung, who got involved with Dong-sik, decides to catch the serial killer.
Meanwhile, Seo In-woo (Park Sung-hoon), the director and son of the chairman of Daehan Securities where Dong-sik works, turns out to be the heartless psychopath serial killer. He loses his diary when his 6th victim, a homeless old man tossed his diary away. He feels insecure ever since, He is obsessed and in love with DongSik.
Cast
Main
- Yoon Shi-yoon as Yook Dong-sik, a timid and pushover man who works as a clerk at Daehan Securities. His weak personality begins to change when he perceives himself as a killer.
- Jung In-sun as Shim Bo-kyung, an officer in a patrol station.
- Park Sung-hoon as Seo In-woo, the real psychopathic serial killer who is also the director of Daehan Securities where Dong-sik works at.
Supporting
People around Yook Dong-sik
- Lee Han-wi as Yook Jong-chul, Dong-sik's father.
- Hwang Geum-byul as Yook Ji-yeon, Dong-sik's older sister.
- Kim Gyul as Jo Yong-gu, Dong-sik's brother-in-law.
- Jung Su-bin as Yook Dong-chan, Dong-sik's younger half-brother.
- So Hee-jung as Na In-hye, Dong-sik's step-mother, Dong-chan's mother.
- Heo Sung-tae as Jang Chil-sung, a gangster who lives at Unit 708. He later addresses Dong-sik as his 'Big Boss' after mistakenly believes him to be a serial killer.
People around Shim Bo-kyung
- Choi Sung-won as Heo Taek-soo, Bo-kyung's partner.
- Kim Myung-soo as Shim Seok-gu, Bo-kyung's father who is a former investigator police.
- Lee Kan-hee as Lee Suk-yeon, Bo-kyung's mother.
- Lee Hae-young as Officer Ryu Jae-joon
People around Seo In-woo
- Park Jung-hak as Seo Chung-hyeon, In-woo's father who is the chairman of Daehan Securities.
- Yoo Bi as Seo Ji-hun, In-woo's step-brother and managing director of Daehan Securities.
- Yoon Ye-hee as Kim Eun-shil, Chung-hyeon's wife and Ji-hun's mother.
- Kim Hye-na as Seo Ji-eun, In-woo's step-sister.
- Lim Il-gyu as Kim Chan-il, In-woo's brother-in-law.
- Han Soo-hyun as Kim Mu-seok, former detective who now works for In-woo.
People at Daehan Securities
- Choi Dae-chul as Gong Chan-seok, the manager of Team 3 and Dong-sik's boss who is selfish and rude.
- Kim Ki-doo as Park Jae-ho, Dong-shik's cunning team member who claims to be his best friend.
- Jo Shi-nae as Han Jung-ah, Dong-sik's colleague.
- Lee Min-ji as Oh Min-joo
- Choi Tae-hwan as Shin Seok-hyun
- Hwang Sun-hee as Jo Yoo-jin
Others
- Gu Ja-geon as a bully
Special appearances
- Jung Hae-kyun as Kim Myung-gook, a homeless man. (Ep. 1–2)
- Yura as a girl with a dog in park (Ep. 2)
- Nam Jung-hee as murder victim (Ep. 2)
- Jo Yoon Ho as Chil-sung's junior (Ep. 2)
- Han Ji-eun as a woman with a big guy (Ep. 2)
- Yoon Ji-on as Joo Young-min (Ep. 4–5)
- Lee Hyun-woong as Oh Myung-dal (Ep. 12–13, 16)
Production
The first script reading was held in August 2019 in Sangam-dong, Seoul.
Original soundtrack
Part 1
| No. | Title | Artist | Length |
|---|---|---|---|
| 1. | "Wanna be Bad" (슬퍼하고싶어) | Woosung (The Rose) | 2:59 |
| 2. | "Wanna be Bad" (Inst.) | 2:59 | |
| Total length: | 5:18 | ||
Part 2
| No. | Title | Artist | Length |
|---|---|---|---|
| 1. | "Stay the same" (동일하게) | Cha Yeo-wool | 3:26 |
| 2. | "Stay the same" (Inst.) | 3:26 | |
| Total length: | 6:52 | ||
| No. | Title | Artist | Length |
|---|---|---|---|
| 1. | "Psychopath Diary" (Opening Title) | Um Ki Yup, Um Ki Hyun, Lee Sun Gyeol | 2:54 |
| 2. | "Dongshik's Polka" | Um Ki Yup, Um Ki Hyun, Lee Sun Gyeol | 2:35 |
| 3. | "Red Diary" | Um Ki Yup, Park Min Ji | 2:40 |
| 4. | "Suspense" | Kim Hee Jin | 1:40 |
| 5. | "Dongshik's related memories" | Um Ki Yup, Um Ki Hyun, Park Min Ji | 3:46 |
| 6. | "Do I look like a pushover" | Um Ki Yup, Um Ki Hyun | 3:10 |
| 7. | "I'm a Psycho" | FaraEffect | 3:06 |
| Total length: | 24:17 | ||
Viewership
| Season | Episode number | Average | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | |||
| 1 | 440 | 329 | 451 | 570 | 563 | 586 | 613 | 582 | 507 | 398 | 426 | 572 | 502 | 615 | 719 | 710 | 536 | |
| Ep. | Original broadcast date | Average audience share (Nielsen Korea) | |
|---|---|---|---|
| Nationwide | Seoul | ||
| 1 | November 20, 2019 | 1.766% | 1.730% |
| 2 | November 21, 2019 | 1.463% | 1.361% |
| 3 | November 27, 2019 | 1.928% | 2.057% |
| 4 | November 28, 2019 | 2.206% | 2.174% |
| 5 | December 4, 2019 | 2.368% | 2.507% |
| 6 | December 5, 2019 | 2.212% | 2.346% |
| 7 | December 11, 2019 | 2.424% | 2.866% |
| 8 | December 12, 2019 | 2.299% | 2.782% |
| 9 | December 18, 2019 | 2.014% | 2.099% |
| 10 | December 19, 2019 | 1.693% | 1.954% |
| 11 | December 25, 2019 | 1.708% | 2.025% |
| 12 | December 26, 2019 | 2.295% | 2.718% |
| 13 | January 1, 2020 | 1.939% | 2.213% |
| 14 | January 2, 2020 | 2.423% | 2.633% |
| 15 | January 8, 2020 | 2.685% | 2.762% |
| 16 | January 9, 2020 | 2.983% | 3.372% |
| Average | 2.150% | 2.350% | |