Yong Pal

Director

• 
  Oh Jin Suk

Screenwriter

• 
  Jang Hyuk Rin

Main Role

• 
  Joo Won

  Yong Pal / Kim Tae Hyun

  Main Role
• 
  Kim Tae Hee

  Han Yeo Jin

  Main Role
• 
  Jo Hyun Jae

  Han Do Joon

  Main Role
• 
  Chae Jung An

  Lee Chae Yeong

  Main Role

Support Role

• 
  Jung Woong In

  Chief Surgeon Lee

  Support Role
• 
  Bae Hae Seon

  Ms. Hwang

  Support Role
• 
  Jo Bok Rae

  Park Tae Yong

  Support Role
• 
  Stephanie Lee

  Park Cynthia / Shin Sa Ah

  Support Role
• 
  Kim Mi Kyung

  [Surgery head nurse]

  Support Role
• 
  Oh Na Ra

  [ICU Head Nurse]

  Support Role
• 
  Ahn Se Ha

  Hyun Man Shik [Tae Hyun's loan shark]

  Support Role
• 
  Yoo Seung Mok

  Detective Lee

  Support Role
• 
  Jo Hwi

  Detective Kim

  Support Role
• 
  Moon Ji In

  Nurse Song

  Support Role
• 
  Choi Joon Yong

  [Tae Hyun's Father]

  Support Role
• 
  Song Kyung Chul

  Doo Cheol [Mob Boss]

  Support Role
• 
  Park Hye Soo

  Kim So Hyun [Tae Hyun's younger sister]

  Support Role
• 
  Yoo Joon Hong

  [Resident Doctor]

  Support Role
• 
  Im Hwa Young

  Han Song Yi [Resident Doctor]

  Support Role
• 
  Kim Dong Seok

  Kim Do Yeon [Resident Doctor]

  Support Role
• 
  Nam Myeong Ryeol

  [Chae Yeong's Father & Vice President of Hanshin Hotels]

  Support Role
• 
  Jang Gwang

  Go Seung Hoon [President of Hanshin Construction]

  Support Role
• 
  Choi Byung Mo

  Min [Chief Secretary of Hanshin Group]

  Support Role
• 
  Cha Soon Bae

  Doctor Shin

  Support Role
• 
  Park Hyun Sook

  Ms. Lee [Head of Housekeeping]

  Support Role
• 
  Park Pal Young

  [Director of Hanshin Hospital]

  Support Role
• 
  Jung Dong Gyu

  Choi Cheol Min [CEO of Hanshin Precision]

  Support Role
• 
  Min Jin Woong

  Lee Sang Chul [Bodyguard]

  Support Role
• 
  Jang Seo Kyung Support Role
• 
  Kwon Tae Won

  [Hanshin Group's Chief Bodyguard]

  Support Role
• 
  Lee Gyu Sub

  [Mobster]

  Support Role
• 
  Kim Ho Chang

  Han Yoo Jin [Hanshin Group Employee]

  Support Role
• 
  Lee Yang Hee

  [Dae Jeong Group Employee]

  Support Role
• 
  Ha Soo Ho

  Kyeong Ho [Team lead]

  Support Role
• 
  Kim Gwang In

  Lee Seung Hoon [Manager]

  Support Role
• 
  Jung Kyung Ho

  Do Cheol Soo Ha

  Support Role
• 
  Jin Seo Yul

  So Hyun [Young]

  Support Role

Guest Role

• 
  Kim Na Woon

  [Tae Hyun's mother]

  Guest Role
• 
  Choi Shang

  Choi Sung Hoon [Yeo Jin's late boyfriend]

  Guest Role
• 
  Im Kang Sung

  Cha Sae Hoon [Hallyu star] (Ep.3-4)

  Guest Role
• 
  Park Young Soo

  [Head of Hanshin Hospital Administration] (Ep. 2)

  Guest Role
• 
  So Hee Jung

  [Nun] (Ep.8-9)

  Guest Role
• 
  Kim Dan Yool

  Han Do Joon [Young] (Ep.9)

  Guest Role
• 
  Park Isiah

  Ali (Ep.9-10)

  Guest Role
• 
  Go In Beom

  Choi [CEO of Dae Jeong Group / Sung Hoon's father] (Ep. 15-16)

  Guest Role
• 
  Kim Yoon Chan

  [Sang Chul's senior]

  Guest Role
• 
  Jung Yoon Suk

  Kim Tae Hyun [Young]

  Guest Role
• 
  Kang Ji Woo

  Yeo Jin [Child]

  Guest Role
• 
  Kim Jae Yeong

  Yong Pal

  Guest Role
• 
  Kim Bo Jung

  Kim Yeong Mi [Employee of Hanshin Electric]

  Guest Role
• 
  Kim Jeong Hak

  Dr. Kim [Neurologist at Hanshin Hospital] (Ep.14-15)

  Guest Role
• 
  Choi Hong Il

  [Chief of Police]

  Guest Role
• 
  Kim Jae Il Guest Role
• 
  Choi Na Moo

  Nurse Jo

  Guest Role
• 
  Bae Jin Woong

  [Mobster]

  Guest Role
• 
  Jung Suk Yong

  [Anesthesiologist at Hanshin Hospital]

  Guest Role
• 
  Kim Kyung Ryong

  [Member of Security]

  Guest Role
• 
  Yannie Kim

  [Pregnant Lady] (Ep.9)

  Guest Role
• 
  Kim Ik Tae

  Han Tae Seob [CEO of Hanshin Chemistry] (Ep. 11)

  Guest Role
• 
  Hwang Dong Hee

  [Bodyguard]

  Guest Role
• 
  Kim Jung Seok

  [Manager of Proton Center]

  Guest Role
• 
  Cheon So Ra Guest Role
• 
  Shin Soo Ho Guest Role
• 
  Jung Yun Ha

  [VIP's daughter]

  Guest Role
• 
  Kwon Byung Joon Guest Role
• 
  Choi Dae Sung

  [Operator at Proton Center] (Ep. 4)

  Guest Role
• 
  Ham Jin Sung

  [Bodyguard]

  Guest Role
• 
  Park Sook Myung

  [VIP patient]

  Guest Role
• 
  Bang Dae Han

  [Ali's father]

  Guest Role
• 
  Park Dae Kyu Guest Role