Psychopath Diary cast, led by Yoon Shi-yoon as Yook Dong-sik, a timid clerk who, after witnessing a murder and suffering amnesia, mistakenly believes he is the killer.
Table of Contents
Introduction
Psychopath Diary is a captivating South Korean television series that aired from November 2019 to January 2020. This dark comedy-thriller follows the story of Yook Dong-sik, a timid and ordinary clerk who, after witnessing a murder and suffering from amnesia, mistakenly believes he is the killer. As Dong-sik navigates his new reality, he becomes entangled in a dangerous game of deception, crime, and self-discovery.
The series is renowned for its unique storyline, blending suspense, dark humor, and psychological intrigue. At its core, Psychopath Diary thrives on the brilliant performances of its cast, who brought the complex characters to life with depth and authenticity. From Yoon Shi-yoon’s transformation as Dong-sik to Jung In-sun’s fearless portrayal of Shim Bo-kyung, the cast delivers unforgettable performances that keep viewers on the edge of their seats.
Psychopath Diary Cast
Yoon Shi-yoon as Yook Dong-sik
Yoon Shi-yoon plays Yook Dong-sik, a timid and somewhat clueless office worker whose life takes a dark turn after witnessing a murder and suffering from amnesia. When he wakes up, he finds a diary belonging to a notorious psychopath and mistakenly believes he is the killer. Yoon Shi-yoon’s performance is both captivating and versatile, skillfully portraying Dong-sik’s transformation from an ordinary man to someone grappling with his dark identity. His ability to balance the character’s vulnerability with moments of dark humor adds depth to the role.
Jung In-sun as Shim Bo-kyung
Jung In-sun portrays Shim Bo-kyung, a determined and sharp-witted police officer who becomes entangled with Dong-sik as she investigates the murder case. Despite the dark nature of the story, Bo-kyung’s character adds a refreshing sense of justice and emotional strength. Jung In-sun’s portrayal is both fierce and compassionate, highlighting Bo-kyung’s dedication to uncovering the truth while dealing with her personal struggles.
Park Sung-hoon as Seo In-woo
Park Sung-hoon plays Seo In-woo, the true psychopath and the mastermind behind the murder Dong-sik witnessed. In-woo is the polar opposite of Dong-sik—charismatic, manipulative, and dangerous. Park Sung-hoon’s chilling performance as the antagonist is both mesmerizing and terrifying, making him a standout in the series. His ability to convey a complex mix of charm and menace adds layers of tension to the story.
Supporting Cast
Lee Han-wi as Yook Jong-chul
Lee Han-wi portrays Yook Jong-chul, Dong-sik’s strict and overbearing father. His character adds an emotional layer to Dong-sik’s backstory, highlighting the complex family dynamics that shape Dong-sik’s personality and decisions.
Hwang Geum-byul as Yook Ji-yeon
Hwang Geum-byul plays Yook Ji-yeon, Dong-sik’s sister. She provides both support and conflict within the family, as her interactions with Dong-sik reveal hidden tensions and unresolved issues from their past.
Kim Gyul as Jo Yong-gu
Kim Gyul takes on the role of Jo Yong-gu, Dong-sik’s brother-in-law. His character adds an interesting dynamic to the family, creating both comic relief and moments of tension amidst the darker themes of the drama.
Jung Su-bin as Yook Dong-chan
Jung Su-bin portrays Yook Dong-chan, Dong-sik’s half-brother. His role is pivotal in exploring the complex relationships within the family, as well as contributing to the overarching mystery of the story.
So Hee-jung as Na In-hye
So Hee-jung plays Na In-hye, Dong-sik’s stepmother. Her character adds to the emotional conflicts Dong-sik faces, highlighting the strained relationships and familial expectations that influence his identity.
Heo Sung-tae as Jang Chil-sung
Heo Sung-tae portrays Jang Chil-sung, a gangster whose involvement in the series adds an extra layer of danger and suspense. His character’s unpredictable nature keeps viewers guessing about his true intentions.
Choi Sung-won as Heo Taek-soo
Choi Sung-won plays Heo Taek-soo, Bo-kyung’s partner in the police force. His character brings a mix of camaraderie and professional tension, as he works alongside Bo-kyung to unravel the mystery surrounding Dong-sik.
Kim Myung-soo as Shim Seok-gu
Kim Myung-soo takes on the role of Shim Seok-gu, Bo-kyung’s father. His character adds depth to Bo-kyung’s personal story, providing insight into her motivations and emotional struggles.
Lee Kan-hee as Lee Suk-yeon
Lee Kan-hee portrays Lee Suk-yeon, Bo-kyung’s mother. Her character adds complexity to Bo-kyung’s family dynamics, revealing how past traumas shape her approach to justice.
Choi Dae-chul as Gong Chan-seok
Choi Dae-chul plays Gong Chan-seok, Dong-sik’s boss. His role adds an element of corporate intrigue and highlights the workplace tensions that play a significant part in the drama’s plot.
Kim Ki-doo as Park Jae-ho
Kim Ki-doo portrays Park Jae-ho, a colleague of Dong-sik’s. His character contributes to the mystery, as his interactions with Dong-sik reveal hidden secrets and potential motives.
Conclusion
Psychopath Diary is more than just a dark comedy-thriller—it’s a masterfully crafted series that explores the complexities of identity, morality, and the human psyche. The exceptional performances of the main cast, led by Yoon Shi-yoon, Jung In-sun, and Park Sung-hoon, brought the intense, suspenseful narrative to life with depth, authenticity, and emotional resonance.
The supporting cast added layers of intrigue, tension, and emotional conflict, enriching the storyline with diverse characters who each played a vital role in the unfolding mystery. From family dynamics to corporate corruption and psychological manipulation, the ensemble cast’s performances made every twist and turn more gripping and believable.
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FAQs
Who played Yook Dong-sik in Psychopath Diary?
Yoon Shi-yoon portrayed Yook Dong-sik, a timid office worker who mistakenly believes he is a psychopath after amnesia. His performance was praised for its depth and versatility.
What role did Jung In-sun play in the series?
Jung In-sun played Shim Bo-kyung, a determined police officer who becomes entangled in Dong-sik’s life as she investigates the murder case.
Is Park Sung-hoon a well-known actor?
Yes, Park Sung-hoon is a talented actor known for his versatile roles in dramas and films. In Psychopath Diary, he played the chilling antagonist Seo In-woo, a true psychopath.
Did Yoon Shi-yoon receive any awards for his role in Psychopath Diary?
Yes, Yoon Shi-yoon received positive recognition for his role, showcasing his ability to portray both vulnerability and dark, complex emotions.
Who played Dong-sik’s family members in the series?
Dong-sik’s family was portrayed by:
Lee Han-wi as Yook Jong-chul (father)
Hwang Geum-byul as Yook Ji-yeon (sister)
Kim Gyul as Jo Yong-gu (brother-in-law)
Are there any notable behind-the-scenes moments from the cast?
Yes, fans enjoyed behind-the-scenes clips showing the cast’s camaraderie, funny moments, and heartfelt interactions, especially between Yoon Shi-yoon and Jung In-sun.
Did the cast members work together in other projects?
Some cast members, like Yoon Shi-yoon and Park Sung-hoon, have worked on other dramas and films, showcasing their strong acting chemistry beyond Psychopath Diary.
How did the actors prepare for their roles?
The cast underwent intense preparation, including understanding psychological traits, studying criminal behavior, and practicing emotional expressions to deliver authentic performances.
Was Psychopath Diary Yoon Shi-yoon’s first dark role?
No, Yoon Shi-yoon had previously portrayed complex characters, but Psychopath Diary showcased his range in a darker, more psychologically intense role.
Where can I watch Psychopath Diary?
Psychopath Diary is available on streaming platforms like Viki, Kocowa, and sometimes on Netflix, depending on your region.