|Written by||Kwon Eum-mi|
|Directed by||Jo Soo-won|
|Country of origin||South Korea|
|No. of episodes||20|
|Executive producer(s)||Bae Jong-byung|
|Running time||60 minutes|
|Production company(s)||Pan Entertainment|
|Original release||April 11 –|
June 21, 2014
Gap-dong (Korean: 갑동이; RR: Gapdongi) is a 2014 South Korean television series starring Yoon Sang-hyun, Sung Dong-il, Kim Min-jung, Kim Ji-won and Lee Joon. It aired on cable channel tvN from April 11 to June 14, 2014 on Fridays and Saturdays at 20:40 for 20 episodes.
The series is based on the real-life Hwaseong serial murders.
In 1996, the (fictional) city of Iltan in Gyeonggi Province: A young girl gets brutally murdered by an unknown person on a dark night. As the city is gripped by a succession of serial killings, a total of nine murders within a twelve-kilometer radius since 1993, the police conclude that a man they've nicknamed "Gap-dong" is behind the crimes. Detective Yang Cheol-gon is convinced that the actual killer is Ha Il-sik, a resident of the town who is intellectually challenged. His attempt to arrest the suspect fails as Ha commits suicide to prove his innocence. His death inspires his son Moo-yeom to become a police officer to clear his father's name and restore his honor.
Seventeen years later, Moo-yeom is a police detective who spends his career chasing dead ends and helping juvenile delinquents. After the statute of limitations on the case expires, Moo-yeom becomes resigned to the belief that Gap-dong is dead. But then a series of incidents occur in the town that bear an eerie resemblance to Gap-dong's crimes. Cheol-gon, now a well-decorated officer, has recently transferred back to Iltan, and to his dismay, Moo-yeom joins his investigation team to catch Gap-dong once and for all.
- Yoon Sang-hyun as Ha Moo-yeom is a detective in Iltan Police Department's violent crimes unit. He vows to avenge his wrongly accused father.
- Sung Dong-il as Yang Cheol-gon was a police inspector at the time of the original murders, and is now a well-decorated officer. Upon receiving his latest promotion, he surprises his superiors by requesting to be assigned back to Iltan, because he wants to end his career by capturing Gap-dong. Still convinced that Moo-yeom's father was the killer, he is extremely prejudiced against Moo-yeom, which makes for a combative working relationship. He also hiding grief of his daughter's death.
- Kim Min-jung as Maria Oh is a psychiatrist with a mysterious double life and a suspicious curiosity for all things Gap-dong.
- Kim Ji-won as Ma Ji-wool is a 17-year-old high school student and webtoon artist with the pen name "Matilda." Ji-wool becomes pivotal to the case when her webtoon titled The Beast's Path ends up foretelling the crimes. When she becomes the killer's next target, it also serves as a set of clues to find him.
- Lee Joon as Ryu Tae-oh is an inmate of a prison psychiatric hospital, who becomes a barista after his release. With a genius IQ of 150, his excellent and detailed memory may prove valuable to cracking the case, but he also happens to have the disposition to be a dangerous psychopath, and considers Gap-dong his god and hero.
- Jung In-gi as Cha Do-hyeok, the police section chief
- Hyun Woo as young Cha Do-hyeok
- Kang Nam-gil as Han Sang-hoon, a profiler
- Jang Gwang as Jinjo, a monk
- Jo Ji-hwan as Lee Hyung-nyeon, Moo-yeom's partner and wife
- Choo Soo-hyun as Oh Young-ae
- Min Sung-wook as Nam Ki-ri
- Jung Won-joong as Park Joong-goo
- Jang Hee-soo as Kim Young-mi, Maria's mother
- Yoon Kyun-sang as the youngest detective.
- Hong In-young as Hong Sung-hee, a reporter
- Seo Joo-hee as Ji Hwa-ja, Ji-wool's mother
- Yoo Eun-ho as Yang Seon-joo, Cheol-gon's daughter
- Lee Go-eun as young Seon-joo
In this table, the blue numbers represent the lowest ratings and the red numbers represent the highest ratings.
|Ep.||Original broadcast date||Average audience share|
|1||April 11, 2014||1.51%|
|2||April 12, 2014||1.98%|
|3||April 25, 2014||1.37%|
|4||April 26, 2014||1.64%|
|5||May 2, 2014||1.77%|
|6||May 3, 2014||1.76%|
|7||May 9, 2014||1.81%|
|8||May 10, 2014||2.32%|
|9||May 16, 2014||1.72%|
|10||May 17, 2014||2.00%|
|11||May 23, 2014||1.89%|
|12||May 24, 2014||2.08%|
|13||May 30, 2014||1.68%|
|14||May 31, 2014||1.91%|
|15||June 6, 2014||2.32%|
|16||June 7, 2014||2.23%|
|17||June 13, 2014||1.85%|
|18||June 14, 2014||2.17%|
|19||June 20, 2014||2.07%|
|20||June 21, 2014||2.13%|
- This drama airs on a cable channel/pay TV which normally has a relatively smaller audience compared to free-to-air TV/public broadcasters (KBS, SBS, MBC and EBS).
Awards and nominations
|2014||7th Korea Drama Awards||Best New Actor||Lee Joon||Nominated|
- It aired in Thailand on Workpoint TV beginning March 9, 2015.
- In Hong Kong, Macau, Sri Lanka and Southeast Asia, the drama began airing on tvN Asia with a variety of subtitles on 2016.
- Kim, Hee-eun (11 April 2014). "Drama based on murders familiar". Korea JoongAng Daily. Retrieved 2014-04-11.
- "Yoon Sang Hyun Gets Intense for Upcoming tvN Drama Gapdong". Soompi. 9 March 2014. Retrieved 2014-03-11.
- Bae, Sun-young (4 February 2014). "MBLAQ Lee Joon to Turn into Barista in New Drama". TenAsia. Archived from the original on 2014-04-07. Retrieved 2014-03-11.
- Kim, Hee-eun (20 March 2014). "Lee Joon joins new thriller". Korea JoongAng Daily. Retrieved 2014-03-20.
- Hong, Grace Danbi (11 April 2014). "Lee Joon Says MBLAQ Members Liked that He Was a Psychopath in Gapdong". enewsWorld. Retrieved 2014-04-11.
- Jeon, Ah-ram (28 June 2014). "Interview: Lee Joon Shares on Acting as a Psychopath in Gapdong". enewsWorld. Retrieved 2014-06-29.
- "Gap Dong กั๊บดง ถอดรหัสฆ่า / GabDong – ซีรีย์เกาหลี". korea.tlcthai.com. 2 September 2015. Thai: ภาษาไทย