Forest

Composer

• 
  Choi Seong Gwon

Director

• 
  Oh Jong Rok

Screenwriter

• 
  Lee Sun Young

Main Role

• 
  Park Hae Jin

  Kang San Hyuk

  Main Role
• 
  Jo Bo Ah

  Jung Young Jae

  Main Role
• 
  Jung Yeon Joo

  Oh Bo Mi

  Main Role
• 
  Noh Kwang Shik

  Choi Chang

  Main Role

Support Role

• 
  Ryu Seung Soo

  Bong Dae Yong [Aviation Rescue Team Leader]

  Support Role
• 
  Woo Jung Kook

  Ki Pil Young [Aviation Rescue Team]

  Support Role
• 
  Geum Kwang San

  Yang Chul Shik [Aviation rescue team]

  Support Role
• 
  Kim Eun Soo

  Kook Soon Tae [Aviation Rescue Team]

  Support Role
• 
  Ahn Sang Woo

  Park Jin Man [Internal Medicine Doctor]

  Support Role
• 
  Go Soo Hee

  Nurse Kim

  Support Role
• 
  Lee Nam Hee

  [Hospital Director]

  Support Role
• 
  Lee Si Hoon

  Park Hyun Soo [San Hyuk's Aide]

  Support Role
• 
  Kim Soo Hyun

  Chairman Jang

  Support Role
• 
  Jung Soo Kyo

  Han Ji Yong [Head of Investment Division 2]

  Support Role
• 
  Choi Kwang Il

  Kwon Joo Han [Managing Director, Taesung Group]

  Support Role
• 
  Kim Young Pil

  Jo Kwang Pil [Team Leader, Taesung Group]

  Support Role
• 
  Park Ji Il

  [Young Jae's father]

  Support Role
• 
  Lee Do Kyung

  Choi Jung Mok [President of Miryeong Forestry]

  Support Role
• 
  Jung Myung Joon

  Shin Joon Young [Psychiatrist]

  Support Role
• 
  Heo Ji Won

  Cha Jin Woo [Doctor, Young Jae’s ex-boyfriend]

  Support Role
• 
  Kim Min Seok

  Doctor [Young Jae’s friend]

  Support Role
• 
  Han Chul Woo

  Son Dong Il [Forestry Department Team Leader]

  Support Role
• 
  Lee Chang

  Haengwoon Development Rep

  Support Role
• 
  Lee Go Eun

  Jung Young Jae [Young]

  Support Role
• 
  Choi Seung Hoon

  Kang San Hyeok (Young)

  Support Role
• 
  Kwon Ye Eun

  Kang San Yoo [San Hyuk’s sister]

  Support Role
• 
  Myung Jae Hwan

  Kim Man Soo [Aviation Rescue Team]

  Support Role

Guest Role

• 
  Kim Young Jae

  Jung Young Jae's ex-boyfriend (Ep 13)

  Guest Role
• 
  Kwon Young Min

  Jung Young Jae's ex-boyfriend (Ep 13)

  Guest Role
• 
  Park Hyun Woo

  [Yeong Jae's ex-boyfriend] (Ep. 13)

  Guest Role
• 
  Lim Jung Min

  [Taesung Executive]

  Guest Role
• 
  Min Joon Hyun

  [Naseong Development Representative] (Ep 4)

  Guest Role
• 
  Yeo Moo Young

  Yoo Min Sik [Executive Director, Myungsung University Hospital]

  Guest Role
• 
  Kang Moon Kyung

  Assemblyman Kim (Ep 12)

  Guest Role
• 
  Kim Geon Ho

  Park Hyeong Shik [ER Crazed father] (Ep 2)

  Guest Role
• 
  Kim Mi Hye

  [Nurse]

  Guest Role
• 
  Park Hye Jin

  Soon Hae [San Hyuk’s Grandmother]

  Guest Role
• 
  Min Kyung Ok

  [Villager]

  Guest Role
• 
  Park Seung Tae

  [Villager]

  Guest Role
• 
  Yoo Soon Chul

  Heo Choon Shik [Villager]

  Guest Role
• 
  Go Jin Myung

  [Villager]

  Guest Role
• 
  Choi Bum Ho

  Seo Seok Yong [Aviation Rescue Team Commander]

  Guest Role
• 
  Im Byung Ki

  Chairman Hwang Seok Ho [Haeseong Precision] (Ep.18)

  Guest Role
• 
  Kwon Hyuk Soo

  Governor Do

  Guest Role
• 
  Kim Jong Goo

  Chairman Kwon, Taesung Group

  Guest Role
• 
  Lee Yoon Sang

  Senior Managing Director, Hitech

  Guest Role
• 
  Shin Tae Yang

  [Kid]

  Guest Role
• 
  Ahn Ryeo Jin

  [Secretary (Ep. 2)

  Guest Role
• 
  Kim Jin Ho

  [Gangland Boss] (Ep 32)

  Guest Role
• 
  Seo Kwang Jae

  Lee Seok Woo [Professor doing Geological Research funded by Taesung] (Ep. 27)

  Guest Role
• 
  Go Man Kyu

  [Taesung Group's Thug]

  Guest Role
• 
  Lee Joong Yul

  [Hiker] (Ep 15)

  Guest Role
• 
  Oh Seung Chan

  [Detective]

  Guest Role
• 
  In Sung Ho

  Pres. Park Dong Geun [HS Eng] (Ep 30)

  Guest Role
• 
  Park Seong Kyun

  [Prosecutor] (Ep. 32)

  Guest Role
• 
  Choi Chung Ja

  [Villager]

  Guest Role
• 
  Song Kyung Eui

  [Coroner] (Ep 15)

  Guest Role
• 
  Jang Joon Ho

  [Young Jae's Senior Professor]

  Guest Role
• 
  Jung Dong Gyu

  [Judge] (Ep 32)

  Guest Role

Unknown

• 
  Shim Hye Rim Unknown
• 
  Kim Sang Il Unknown
• 
  Im Ho Joon Unknown
• 
  Lee Ah Jin Unknown