Tunnel

Composer

• 
  Jung Se Rin

Director

• 
  Nam Ki Hoon
• 
  Shin Yong Hwi

Screenwriter

• 
  Lee Eun Mi

Visual Effects

• 
  Ryu Gun Hee

Main Role

• 
  Choi Jin Hyuk

  Park Kwang Ho

  Main Role
• 
  Yoon Hyun Min

  Kim Sun Jae

  Main Role
• 
  Lee Yoo Young

  Shin Jae Yi

  Main Role

Support Role

• 
  Jo Hee Bong

  Jeon Sung Shik

  Support Role
• 
  Kim Byung Chul

  Kwak Tae Hee

  Support Role
• 
  Kang Ki Young

  Song Min Ah

  Support Role
• 
  Kim Min Sang

  Mok Jin Woo

  Support Role
• 
  Lee Shi A

  Shin Yun Suk

  Support Role
• 
  Moon Sook

  Hong Hye Won

  Support Role
• 
  Yang Joo Ho

  Oh Ji Hoon

  Support Role
• 
  Heo Sung Tae

  Jung Ho Young

  Support Role
• 
  Kim Jeong Hak

  Kim Wan

  Support Role
• 
  Yoo Dam Yeon

  Lee Nan Young

  Support Role
• 
  Seok Bo Bae

  Seo Hee Soo

  Support Role
• 
  Han Yeo Wool

  Hwang Choon hee

  Support Role
• 
  Park Myung Shin

  Lee Sun Ok

  Support Role
• 
  Lee Young Hee

  [Jung Sook's mother]

  Support Role

Guest Role

• 
  Kim Hye Yoon

  Kim Yeong Ja [Young] (Ep. 3, 13)

  Guest Role
• 
  Oh Yoon Hong

  Madam Jung [Teahouse manager] (Ep. 1)

  Guest Role
• 
  Jung Suk Yong

  Dr. Kim [Forensic Pathologist, 1986] (Ep.1)

  Guest Role
• 
  Kim Jong Ho

  [Tailor shop president] (Ep. 1)

  Guest Role
• 
  Jung Yi Rang

  Lee Geum Soon (Ep. 3)

  Guest Role
• 
  Jung Soon Won

  [Thief] (Ep. 4)

  Guest Role
• 
  Park Jung Hak

  [Senior police officer] (Ep. 9)

  Guest Role
• 
  Song Jae Ryong

  Kim Kyung Tae (Ep.12)

  Guest Role
• 
  Joey Albright

  LT Jim Headley [Tiffany's soldier boyfriend] (Ep. 15)

  Guest Role
• 
  Seo Yoon Ah

  [Pregnant woman] (Ep. 16)

  Guest Role
• 
  Hong Boo Hyang

  [Mother of military accident victim]

  Guest Role
• 
  Hong Suk Youn

  [Shinhae Chemical former employee]

  Guest Role
• 
  Kim Min Kyung

  [Ah Ra's mother] (Ep. 6)

  Guest Role
• 
  Nam Moon Chul

  Detective Oh

  Guest Role
• 
  Choi Il Hwa

  Yoo Seong Jae [Pharmacist]

  Guest Role
• 
  Choi Min Geum Guest Role
• 
  Jo Hyun Jin

  [Jae Yi's student] (Ep. 1)

  Guest Role
• 
  Kim Young Hee

  [Gambler] (Ep 3)

  Guest Role
• 
  Lee Soo Yeon

  Seo Jung Eun

  Guest Role
• 
  Park Jae Won

  [Photo Journalist] (Ep 10)

  Guest Role
• 
  Ahn Soo Bin

  Lee Seo Yeon (Ep. 8)

  Guest Role
• 
  Choi Gyo Shik

  O Yeong Dal

  Guest Role
• 
  Seo Jung Joon

  Lee Hyun Woo [Employee]

  Guest Role
• 
  Kim Seul Woo

  Kim Seon Jae [Young]

  Guest Role
• 
  Choi Seung Hoon

  Mok Jin Woo [Child]

  Guest Role
• 
  Noh Tae Yeob

  Mok Jin Woo [Young]

  Guest Role
• 
  Kim Dong Young

  Jun Sung Shik [Young]

  Guest Role
• 
  Lee Da Kyung

  Shin Jae Yi [Teen]

  Guest Role
• 
  Ham Sung Min

  Jung Ho Young [Young]

  Guest Role
• 
  Yoo Kyung Hoon

  [District police officer]

  Guest Role
• 
  Park Seung Tae

  [Grandmother living in Kwang Ho's hometown]

  Guest Role
• 
  Kim Won Joong

  [Culprit who runs away in handcuffs]

  Guest Role
• 
  Baek Hyeon Ju

  [Ji Eun's older sister]

  Guest Role
• 
  Kim Young Sun

  [Ho Young's psychiatrist]

  Guest Role
• 
  Shin Yeon Suk

  [Muyeong oriental medicine clinic grandmother]

  Guest Role
• 
  Jung Ji Hoon

  [Child]

  Guest Role
• 
  Kwak Min Seok

  [Hwayang police department chief, 1986]

  Guest Role
• 
  Min

  [Young Kil's girlfriend]

  Guest Role
• 
  Kim Chu Wol

  [Hostess of Ho motel]

  Guest Role
• 
  Ok Joo Ri

  [Hye Ji's neighbor]

  Guest Role
• 
  Kang Suk Won

  [Hwayang police station detective, 1986]

  Guest Role
• 
  Kwon Ban Suk

  [Sun Jae's partner]

  Guest Role
• 
  Yun Seo Jeong

  [Community center staff]

  Guest Role
• 
  Park Se Mi

  [Da Young's friend]

  Guest Role
• 
  Park Jin Soo

  [Student]

  Guest Role
• 
  Jo Seung Yun

  [Police station section head chief]

  Guest Role
• 
  Hong Ki Joon

  [Detective]

  Guest Role
• 
  Seo Woo Jin

  [Detective]

  Guest Role
• 
  Choi Na Moo

  [Actress]

  Guest Role
• 
  Ryu Tae Ho

  Jang Yeong Cheol

  Guest Role
• 
  Song Young Jae

  Kim Tae Soo

  Guest Role
• 
  Jo Shi Nae

  Kim Young Ja

  Guest Role
• 
  Woo Hyun

  Go Man Seok

  Guest Role
• 
  Choi Won Hong

  Yoon Dong Woo

  Guest Role
• 
  Choi Myung Bin

  Yoon Soo Jung

  Guest Role
• 
  Im Kang Sung

  Ma Young Gil

  Guest Role
• 
  Jeon Jin Ki

  Kim In Hwan

  Guest Role
• 
  Jin Yong Wook

  Lee Dae Hwan

  Guest Role
• 
  Lee Dong Jin

  Hwang Do Kyung

  Guest Role
• 
  Seo Eun Ah

  Kim Mi Soo

  Guest Role
• 
  Jung Han Bi

  Yoon Yeong Joo

  Guest Role
• 
  Lee Yong Nyeo

  Yoo Ok Hee

  Guest Role
• 
  Ahn Yong Joon

  Kim Hee Joon

  Guest Role
• 
  Cha Hak Yeon

  Park Kwang Ho

  Guest Role
• 
  Jeon Jae Hyung

  No Yeong Jin

  Guest Role

Unknown

• 
  Jun Jung Kwan Unknown
• 
  Min Ji Yul Unknown
• 
  Choi Young Unknown
• 
  Yoo Jang Young Unknown
• 
  Moon Soo Bin Unknown
• 
  Son Yeong Soon Unknown
• 
  Jo Seong Yun Unknown
• 
  Kang Hak Soo Unknown
• 
  Han Sang Gil Unknown
• 
  Lee Sun Young Unknown
• 
  Kim Ji An Unknown
• 
  Park Jin U Unknown
• 
  Shin Se Young Unknown
• 
  Shin Soo Hyun Unknown
• 
  Lee Ja Ryoung Unknown