Diary of a Prosecutor

Diary of a Prosecutor is a 2019 South Korean television series starring Lee Sun-kyun, Jung Ryeo-won, Lee Sung-jae, Kim Kwang-kyu, Lee Sang-hee and Jeon Sung-woo. Based on an essay by prosecutor Kim Woong, it aired on JTBC on Mondays and Tuesdays at 21:30 (KST) from December 16, 2019 to February 11, 2020.

Synopsis
The story follows the daily lives of overworked prosecutors in the fictional city of Jinyoung, South Korea.

Main

 * Lee Sun-kyun as Lee Sun-woong
 * The narrator of the story. Sun-woong is a passionate prosecutor of the Criminal Unit 2 who entered the prosecution ten years ago. He comes from a wealthy background and was acquainted with Myung-joo back in university, though the latter dislike him for being unaware of how privileged he was. He is often in disagreement with Myung-joo soon after she becomes his colleague.


 * Jung Ryeo-won as Cha Myung-joo
 * Formerly a successful prosecutor in Seoul, Myung-joo has no choice but to move to Jinyoung and work at the District Prosecutors' Office until she can go back to the capital. She was Sun-woong's junior at university but she entered the prosecution one year earlier than him. She tends not to spend useless time on cases, she thus appears careless in the eyes of some of her colleagues.


 * Lee Sung-jae as Jo Min-ho
 * Chief of Jinyoung District Prosecutor's Office's Criminal Unit 2, Min-ho has been a prosecutor for 18 years. He cannot bear that his team keeps coming second in the office. Following his incident in Seoul, he succeeds in convincing her of joining his unit and hopes that her arrival will raise his team's results.


 * Kim Kwang-kyu as Hong Jong-hak
 * He has been a prosecutor for 14 years.


 * Lee Sang-hee as Oh Yoon-jin
 * A working mother who has been a prosecutor for 4 years.


 * Jeon Sung-woo as Kim Jung-woo
 * The youngest prosecutor of the Criminal Unit 2. Myung-joo becomes his mentor soon after settling in Jinyoung, replacing Sun-woong. Jung-woo enjoys going on dates but his workload usually prevents him from doing so. He doesn't have a real passion for his job but decided to become a prosecutor because the profession is well seen by others.

Supporting

 * Baek Hyun-joo as Jang Man-ok
 * An investigator with 30 years of experience who usually works closely with Sun-woong.


 * Ahn Chang-hwan as Lee Jeong-hwan
 * An investigator with 8 years of experience who is appointed to Myung-joo's office.


 * Ahn Eun-jin as Seong Mi-ran
 * An assistant with 3 years of experience who is very quiet and only speaks when necessary.


 * Jung Jae-sung as Kim In-joo
 * A prosecutor with 24 years of experience and the head of the branch.


 * Kim Yong-hee as Chief Nam
 * A prosecutor with 18 years of experience who entered the prosecution the same year as Min-ho.


 * Shin Cheol-jin as Ryu-jin
 * Park Sung-yeon as Kang Young-hee
 * Cha Soon-bae as Choi Tae-joong, a lawyer.
 * Kwak Ja-young as Lee Soon-chul, a shaman.
 * Son Kyung-won as Kim Young-chun, an industrial worker.

Production
Screenwriter Park Yeon-seon, who created the series, and director Lee Tae-gon previously worked together on the television series Hello, My Twenties! (2016) and its sequel Hello, My Twenties! 2 (2017).

The first script reading took place in July 2019 at JTBC Building in Sangam-dong, Seoul, South Korea.

Filming and promotion
Filming began on August 24, 2019, and wrapped up on January 22, 2020. Scenes taking place in the fictional city of Jinyoung were filmed in Tongyeong, in South Gyeongsang Province, where more than 150 members of the cast and crew resided during the five months of filming.

The series showcase took place at Imperial Palace Seoul on December 16, 2019, a few hours before the premiere, in presence of the six main actors.