Pemeran I Hear Your Voice

Lee Jong Suk (이종석)

as Park Soo Ha

Pemeran Utama

Lee Bo Young (이보영)

as Jang Hye Sung

Pemeran Utama

Yoon Sang Hyun

as Cha Kwan Woo

Pemeran Utama

Lee Da Hee (이다희)

as Seo Do Yeon

Pemeran Utama

Jung Woong In

as Min Joon Kook

Pemeran Pembantu

Yoon Joo Sang

as Shin Sang Duk

Pemeran Pembantu

Park Doo Shik

as Kim Chung Gi

Pemeran Pembantu

Kim Ga Eun

as Ko Sung Bin

Pemeran Pembantu

Jang Hee Woong

as Prosecutor Jo

Pemeran Pembantu

Kim Byung Ok

as Hwang Dal Jung

Pemeran Pembantu

Kim Kwang Gyu

as Kim Kong Sook

Pemeran Pembantu

Choi Sung Joon

as Choi Yoo Chang

Pemeran Pembantu

Jung Dong Hwan

as Seo Dae Seok

Pemeran Pembantu

Kim Hae Sook

as Eo Choon Shim

Pemeran Pembantu

Park Jung Woo

as Ha Myung

Pemeran Pembantu

Lee Jung Hyuk

as Lee Jung Hoon

Pemeran Pembantu

Kim Gwang In

as [Chief prosecutor]

Pemeran Pembantu

Yeo Ho Min

as Woon Seung [Police officer]

Pemeran Pembantu

Kim So Hyun (김소현)

as Jang Hye Sung [Young]

Pemeran Pembantu

Lee Dong Jin

as [Judge]

Pemeran Pembantu

Jung Geun

as Kang Seung Goo

Pemeran Pembantu

Hong Yeo Jin

Pemeran Pembantu

Kim Sung Kyun (김성균)

as [Detective] (Ep. 1)

Bintang Tamu

Jeon Soo Kyung

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

Bintang Tamu

So Yi Hyun

as [Lawyer] (Ep. 1, 12)

Bintang Tamu

Han Ki Woong

as Jeong Pil Seung (Ep. 4-6)

Bintang Tamu

Han Ki Won

as Jeong Pil Jae (Ep. 4-6)

Bintang Tamu

Lee Byung Joon

as [Free newspaper owner] (Ep. 7)

Bintang Tamu

Kim Ki Cheon

as [Pervert] (Ep. 9)

Bintang Tamu

Ahn Moon Sook

as [Head of the orphanage] (Ep. 13)

Bintang Tamu

Kim Min Jong

as Choi Yoon (Ep. 14)

Bintang Tamu

Uhm Ki Joon

as Lawyer Uhm Ki Joon (Ep. 14)

Bintang Tamu

Ahn Young Mi

as [Shop customer] (Ep. 16)

Bintang Tamu

Kim Mi Ryu

as [Shop clerk] (Ep. 16)

Bintang Tamu

Kangnam

as [Pickpocket] (Ep. 17)

Bintang Tamu

Jung Man Sik

as [Chief police recruiter] (Ep. 18)

Bintang Tamu

Kim Jung Soo

as Woo Sung Sik [Center Head]

Bintang Tamu

Kim Soo Yeon

as Moon Dong Hee

Bintang Tamu

Gu Seung Hyun

as Park Soo Ha [Young]

Bintang Tamu

Jung Min Ah

as Seo Do Yeon [Young]

Bintang Tamu

Lee Shi Hoo

as [Student]

Bintang Tamu

Lee Sol Gu

as [Detective]

Bintang Tamu

Son Seon Geun

as [Doctor]

Bintang Tamu

Park Chul Hyun

as [Disorderly student]

Bintang Tamu

Mun Seong Nam

Composer

Jo Soo Won

Sutradara

Lee Sung Hoon

Producer

Park Hye Ryun

Screenwriter