I Hear Your Voice (2013)

Composer

• 
  Mun Seong Nam

Director

• 
  Jo Soo Won

Producer

• 
  Lee Sung Hoon

Screenwriter

• 
  Park Hye Ryun

Main Role

• 
  Lee Jong Suk

  Park Soo Ha

  Main Role
• 
  Lee Bo Young

  Jang Hye Sung

  Main Role
• 
  Yoon Sang Hyun

  Cha Kwan Woo

  Main Role
• 
  Lee Da Hee

  Seo Do Yeon

  Main Role

Support Role

• 
  Jung Woong In

  Min Joon Kook

  Support Role
• 
  Yoon Joo Sang

  Shin Sang Duk

  Support Role
• 
  Park Doo Shik

  Kim Chung Gi

  Support Role
• 
  Kim Ga Eun

  Ko Sung Bin

  Support Role
• 
  Jang Hee Woong

  Prosecutor Jo

  Support Role
• 
  Kim Byung Ok

  Hwang Dal Jung

  Support Role
• 
  Kim Kwang Gyu

  Kim Kong Sook

  Support Role
• 
  Choi Sung Joon

  Choi Yoo Chang

  Support Role
• 
  Jung Dong Hwan

  Seo Dae Seok

  Support Role
• 
  Kim Hae Sook

  Eo Choon Shim

  Support Role
• 
  Park Jung Woo

  Ha Myung

  Support Role
• 
  Lee Jung Hyuk

  Lee Jung Hoon

  Support Role
• 
  Kim Gwang In

  [Chief prosecutor]

  Support Role
• 
  Choi Dae Sung

  [Do Yeon's office employee]

  Support Role
• 
  Yeo Ho Min

  Woon Seung [Police officer]

  Support Role
• 
  Kim So Hyun

  Jang Hye Sung [Young]

  Support Role
• 
  Lee Dong Jin

  [Judge]

  Support Role
• 
  Jung Geun

  Kang Seung Goo

  Support Role
• 
  Kim Seo Jung

  Hong Bo Hee [Do Yeon's office employee]

  Support Role
• 
  Hong Yeo Jin Support Role

Guest Role

• 
  Kim Sung Kyun

  [Detective] (Ep. 1)

  Guest Role
• 
  Kim Hye Yoon

  Kim Yeon Jin [Do Yeon's high school friend] (Ep. 1)

  Guest Role
• 
  Jeon Soo Kyung

  [Woman handing out promotional materials] (Ep. 1)

  Guest Role
• 
  So Yi Hyun

  [Lawyer] (Ep. 1, 12)

  Guest Role
• 
  Han Ki Woong

  Jeong Pil Seung (Ep. 4-6)

  Guest Role
• 
  Han Ki Won

  Jeong Pil Jae (Ep. 4-6)

  Guest Role
• 
  Lee Byung Joon

  [Free newspaper owner] (Ep. 7)

  Guest Role
• 
  Kim Gi Cheon

  [Pervert] (Ep. 9)

  Guest Role
• 
  Kim Mi Kyung

  Jeon Yeong Ja [Dal Jung's wife] (Ep. 12-14, 16)

  Guest Role
• 
  Ahn Moon Sook

  [Head of the orphanage] (Ep. 13)

  Guest Role
• 
  Kim Min Jong

  Choi Yoon (Ep. 14)

  Guest Role
• 
  Uhm Ki Joon

  Lawyer Uhm Ki Joon (Ep. 14)

  Guest Role
• 
  Ahn Young Mi

  [Shop customer] (Ep. 16)

  Guest Role
• 
  Kim Mi Ryu

  [Shop clerk] (Ep. 16)

  Guest Role
• 
  Kangnam

  [Pickpocket] (Ep. 17)

  Guest Role
• 
  Jeong Man Sik

  [Chief police recruiter] (Ep. 18)

  Guest Role
• 
  Kim Jung Soo

  Woo Sung Sik [Center Head]

  Guest Role
• 
  Kim Soo Yeon

  Moon Dong Hee

  Guest Role
• 
  Gu Seung Hyun

  Park Soo Ha [Young]

  Guest Role
• 
  Jo Duk Hyun

  Park Joo Hyuk [Soo Ha's father]

  Guest Role
• 
  Jung Min Ah

  Seo Do Yeon [Young]

  Guest Role
• 
  Lee Shi Hoo

  [Student]

  Guest Role
• 
  Lee Sol Gu

  [Detective]

  Guest Role
• 
  Son Seon Geun

  [Doctor]

  Guest Role
• 
  Park Chul Hyun

  [Disorderly student]

  Guest Role
• 
  Kim Kyung Jin

  [Supermarket owner's son]

  Guest Role

Unknown

• 
  Park Jong Seol Unknown
• 
  Park Sung Joon Unknown
• 
  Kim Jong Ho Unknown
• 
  Go Won Seok Unknown