as Detective Jo Yang Young-jo as Myung-jin Park Bo-gum as Dong-hyun, Soo-ah's younger brother (career debut) Sung Yu-bin as young Dong-hyun Dolly as Seul-gi Sa-hee as Jung-yeon Kim Mi-kyung as school director Choi Phillip as detective from Information Section Won Pung-yeon as Detective 1 Jeon Joo-woo as Detective 4 Kim Kyeong-ik as Doctor 2 Baek Ik-nam as owner of car Han Yeo-wool as woman having an abortion Reception Critical reception Derek Elley of Film Business Asia gave the film a 6 out of 10, saying it "has effective moments but doesn't fully realise its potential." Awards Remakes China A Chinese remake titled The Witness starring Yang Mi and Luhan and also directed by Ahn Sang-hoon, finished filming in 2015. It was released in China on October 30. Japan A Japanese remake titled , directed by Junichi Mori and starring Riho Yoshioka, Mahiro Takasugi, Kōji Ōkura, and Kōdai Asaka, was released in Japan on 20 September 2019. India In India the film has remade in two languages; in Tamil language as Netrikann (lit. The Third Eye) starring Nayanthara and in Hindi with the same name starring Sonam Kapoor and directed by Shome Makhija. The Hindi version wrapped up filming on February 13, 2021. The Tamil version was released on Disney+ Hotstar on 13 August 2021 and Hindi version is scheduled to release on ZEE5. References External links 2011 films 2011 crime thriller films South Korean crime thriller films 2010s Korean-language films South Korean films remade in other languages Police detective films 2010s serial killer films Films about blind people South Korean serial killer films Next Entertainment World films 2010s South Korean films