Trigger (South Korean TV series)

Trigger (Korean: 트리거; lit. The Other Side of the Gun) is a 2025 South Korean Netflix original series written and directed by Kwon Oh-seung. Starring Kim Nam-gil and Kim Young-kwang, Released on Netflix on July 25, 2025.^[2]

Trigger
Promotional poster
Hangul	트리거
RR	Teurigeo
MR	T'ŭrigŏ
Genre	Action Thriller
Written by	Kwon Oh-seung
Directed by	Kwon Oh-seung
Starring	Kim Nam-gil Kim Young-kwang
Music by	Hwang Sang-jun[1]
Country of origin	South Korea
Original language	Korean
No. of episodes	10
Production
Running time	37—61 minutes
Production company	Bidangil Pictures
Budget	₩30 billion
Original release
Network	Netflix
Release	July 25, 2025 (2025-07-25)

Synopsis

Trigger follows a rise in illegal gun distribution and escalating gun crimes. The story centers on two men—one a righteous police officer, the other a cunning arms dealer—who wield weapons for vastly different reasons.

Cast

Main

• Kim Nam-gil as Lee Do

A former military sniper turned police officer investigating the illegal firearms trade.^[3]

• Kim Young-kwang as Moon Baek
  • Moon Seong-hyun as teen Moon Baek

A mysterious arms dealer with a dual personality and a carefully orchestrated agenda.^[3]

Supporting

• Park Hoon as Koo Jeong-man

The leader of a cleanup squad working for Gong Seok-ho.^[2]

• Gil Hae-yeon as Oh Kyung-sook

A mother who is on a one-man protest for her son who died from a work-related accident.^[2]

• Kim Won-hae as Jo Hyeon-sik

A police sergeant at Domyeong Police Station and a father figure to Lee Do.^[2]

• Woo Ji-hyun as Yoo Jung-tae

A civil service exam candidate.^[4]

• Yang Seung-ri as Gong Seok-ho

The boss of the Glory Gang.

• Lee Suk as Jeon Won-seong

A sex offender who has an electronic tag on his ankle.

• Jang Dong-joo as Jang Jung-woo

A police officer and Lee Do's partner.^[5]

• Cha Rae-hyung as Seo Hyung-joo

A detective of the Violent Crimes unit of Gyeongin Seobu Police Station.

• Park Yoon-ho as Park Gyu-jin

A bullied student in Jeongil High School.

• Son Bo-seung as Seo Yong-dong

A bullied student in Jeongil High School.

• Hong Min-gi as Kang Seong-joon

A student in Jeongil High School who frequently bullies Gyu-jin and Yong-dong.

• Kim Joong-hee as Wang Dae-hyeon

A freelance reporter who goes on hot pursuit for news of gun crimes and illegal arms distributions.

Special appearances

• Jung Woong-in as Yoon Won-cheol

A superintendent of Gyeongin Seobu Police Station.

• Jo Han-chul as Chief Joo

The chief of the Violent Crimes unit of Gyeongin Seobu Police Station.

• Lee Ji-hoon as a repairman

Formerly a fellow military comrade of Lee Do.

• Carson Allen as subway rider

Production

The series is written and directed by Kwon Oh-seung, who directed Midnight (2021). Its production budget was about ₩30 billion.^[3]