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4th Period Mystery (4교시 추리영역)

4교시 추리영역 (4-kyo-si Choo-ri-yeong-yeok)

Directed by Lee Sang-yong (이상용)

Screenplay by


86min | Release date in South Korea :

During fourth period, high schooler Da-jeong finds his classmate Tae-gyu dead in a classroom and Jeong-hun standing in front of him with blood on his clothes. In order to stop Jeong-hun from becoming the prime suspect, Da-jeong must help him find the real murderer, who is still inside the school building, under 40 minutes before period four ends.


4th Period Mystery | Cast

  • Yoo Seung-ho (유승호)
    Yoo Seung-ho (유승호)
    Han Jeong-hoon (한정훈)
  • Kang So-ra (강소라)
    Kang So-ra (강소라)
    Lee Da-jeong (이다정)
  • Jo Sang-geun (조상근)
    Jo Sang-geun (조상근)
    Problem child, Kim Tae-gyoo (문제아, 김태규)
  • Jeon Joon-hong (전준홍)
    Jeon Joon-hong (전준홍)
    Professor - MBC, Byeong-soo (교사 - 엠비씨, 병수)
  • Jeong Seok-yong (정석용)
    Jeong Seok-yong (정석용)
    Old unmarried professor, Kang Gook-man (노총각 교사, 강국만)
  • Park Cheol-min (박철민)
    Park Cheol-min (박철민)
    Professor - Crazy Dog, Han Kang-man (교사 - 미친개, 한강만)
  • Lee Yeong-jin (이영진)
    Lee Yeong-jin (이영진)
    Librarian, Sang-mi (도서관 관리 사서, 상미)
  • Kim Hee-chan (김희찬)
    Kim Hee-chan (김희찬)
    Loyal friend, Do-il (정의의 친구, 도일)
  • Lee Chan-ho (이찬호)
    Lee Chan-ho (이찬호)
    Tak Teu-in (탁트인)
  • Min Kyeong-jin (민경진)
    Min Kyeong-jin (민경진)
    Principal (교장)
    Ahn Chi-yong (안치용)
    School inspector (장학사)
  • Lim Soo-hyang (임수향)
    Lim Soo-hyang (임수향)
    Lim Soo-hyang, fan 1 (임수향, 팬1)
    Yoon Ji-yeong (윤지영)
    Yoon Ji-yeong, fan 2 (윤지영 팬2)
  • Kim Yeong-woong (김영웅)
    Kim Yeong-woong (김영웅)
    History teacher (국사선생)
    Ryoo Byeong-gil (류병길)
    Tae-gyoo's line 1 (태규라인1)
    Kang Min-hoo (강민후)
    Tae-gyoo's line 2 (태규라인2)
    Lee Eun-yeong (이은영)
    Dodgeball girl (피구녀)
    Lee Jeong-eun (이정은)
    Female student 1 (여학생 1)
    Kim Ji-eun (김지은)
    Female student 2 (여학생 2)
    Lee Hye-rin (이혜린)
    Female student 3 (여학생 3)
    Jeong Se-hyeon (정세현)
    Karaoke female student 1 (노래방 여학생 1)
    Jo Ye-jin (조예진)
    Karaoke female student 2 (노래방 여학생 2)
    Kim Dae-jeong (김대정)
    Karaoke female student 3 (노래방 여학생 3)
    Lee Saet-byeol (이샛별)
    Screaming girl 1 (비명녀 1)
    Sin Yoo-ra (신유라)
    Screaming girl 2 (비명녀 2)
    Seong Hyeok (성혁)
    Gym teacher (체육선생)
    Oh Mi-hye (오미혜)
    Music teacher (음악 선생님)
    Han Jae-sang (한재상)
    Korean teacher (국어 선생님)
    Im Chan-woo (임찬우)
    Security guard (경비원)
    Kim Ho-yeon (김호연)
    Teacher next door (옆반 선생님)
  • Choi In-sook (최인숙)
    Choi In-sook (최인숙)
    School inspector's female secretary (장학사 여비서)
  • Jeong Yeong-gi (정영기)
    Jeong Yeong-gi (정영기)
    Student (학생들)
    Kang Ji-hoon (강지훈)
    Student (학생들)
    Kim Joon-hyeok (김준혁)
    Student (학생들)
  • Kim Min-su (김민수)
    Kim Min-su (김민수)
    Suspect (가상범인)
    Choi Seong-gyeom (최성겸)
    Suspect (가상범인)
    Jang Hee-jeong (장희정)
    Student in grade 2 class 5 (2학년 5반 학생들)
    Go Gil-joo (고길주)
    Student in grade 2 class 5 ( 2학년 5반 학생들)
    Kim Jeong-hoon (김정훈)
    Student in grade 2 class 5 (2학년 5반 학생들)
    Oh Dong-joon (오동준)
    Student in grade 2 class 5 (2학년 5반 학생들)
    Kim Hyeong-geun (김형근)
    Student in grade 2 class 5 (2학년 5반 학생들)
    Song-hyeon (송현)
    Student in grade 2 class 5 (2학년 5반 학생들)
    Kim Jin-yoon (김진윤)
    Student in grade 2 class 5 (2학년 5반 학생들)
    Kim Jin-yoon (김진윤)
    Student in grade 2 class 5 (2학년 5반 학생들)
    Myeong Hong-jin (명홍진)
    Student in grade 2 class 5 (2학년 5반 학생들)
    Do Hyeon-soo (도현수)
    Student in grade 2 class 5 (2학년 5반 학생들)
    Kim Kyeong-hee (김경희)
    Student in grade 2 class 5 (2학년 5반 학생들)
    Byeon Ye-seong (변예성)
    Student in grade 2 class 5 (2학년 5반 학생들)
    Im Eun-ji (임은지)
    Student in grade 2 class 5 (2학년 5반 학생들)
    Jo Nam-mi (조남미)
    Student in grade 2 class 5 (2학년 5반 학생들)
    Park Dan-bi (박단비)
    Student in grade 2 class 5 (2학년 5반 학생들)
    Im Jang-goon (임장군)
    Student in grade 2 class 5 (2학년 5반 학생들)
    Choi Hong-rak (최홍락)
    Student in grade 2 class 5 (2학년 5반 학생들)
    Sin Jin-woo (신진우)
    Student in grade 2 class 5 (2학년 5반 학생들)
    Lee Seung-joon (이승준)
    Student in grade 2 class 5 (2학년 5반 학생들)
    Kim Tae-il (김태일)
    Student in grade 2 class 5 (2학년 5반 학생들)
  • Jo Yoon-hee (조윤희)
    Jo Yoon-hee (조윤희)
    English professor, 홍주희 (영어교사, 홍주희) - Cameo
  • Lee Jong-hwan (이종환)
    Lee Jong-hwan (이종환)
    Class monitor (반장)

4th Period Mystery | News

Attention You're reading the news with potential spoilers, make them spoiler free, dismiss

  • [Exclusive] Ahn Yeong-mi and Jo Sang-geun break up

    2012/01/09, Source,
    Due to national military service and more... they break up after three years. Comedian Ahn Yeong-mi and commercial model Jo Sang-geun, three years her junior, have broken up,...More
  • Kang So-ra Soars to Stardom with 'Sunny - 2010'

    2011/05/28, Source,
    "Sunny - 2010'", the story of seven high school friends who rediscover the best moments of their life at a reunion 25 years later, has attracted over 2 million moviegoers in the two weeks since its release. Kang So-ra, who plays one of the heroines in the film and is the main driving force of the film's popularity, said, "The number of my Twitter followers, which was under 100, soared to over 600 on the release of the film, and most of them are women fans",...More
  • [INTERVIEW] Korean actress Kang So-ra

    2010/07/27, Source,
    Actress Kang So-ra [Lee Jin-hyuk/10Asia] My name is Kang So-ra. I was born on February 18, 1990. I was born early in the year so according to the Lunar calendar, I am a year older, which makes it easier for me to become friends with people born in 1989 but a bit weird to have people born in 1990 call me unni [older sister in Korean], so it's a bit difficult. I published a martial arts novel when I was in fifth grade. The publication was based on a character named Ajin from a martial arts website and this one member whose ID was Nokcheon rooted a lot for me. It's sad that I don't have a copy of it,...More
  • 'Kwang Tae's Basic Story' shown at AISFF
    2009/10/29, Source,
    Actress Ryoo Hyeon-kyeong, who has been recently on the spotlight by expanding her career into film directing, gets into the 'Asiana International Short Film Festival'.

    Ryoo made a great achievement in 'CINE Student' section of the,...
12 2>

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4th Period Mystery | Facts

 Lee Sang-yong (이상용)
 Kyeong Min-ho (경민호)
 Lim Tae-hyeong (임태형)
 Distribution department
 Yozoh (요조)
 Music department
86 min HD 16/9
Web site
Festival(s) & award(s)
Sales or release dates & Box Office
Airing dates : 2009/08/12
South Korean Box Office
Source : &
As of 2009.08.23 : 67,234 admissions (total)
As of 2009.08.16 : 50,471 admissions (total)

4th Period Mystery | Community

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4th Period Mystery (4교시 추리영역)

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