Doctor John

Cha Yo-Han—an arrogant but genius doctor of anesthesiology—and Kang Shi-Young—a smart, warm resident of anesthesiology—work together to help people with mysterious cases of acute or chronic pain.

Drama

Ji Sung

(Cha Yo-Han)

Lee Se-young

(Kang Shi-Young)

Lee Kyoo-hyung

(Son Seok-Ki)

Kim Hye-eun

(Tae-Kyung)

Shin Dong-mi

(Chae Eun-Jung)

Jeon No-min

(Kang Yi-Soo)

Uhm Hyo-seop

(Kang Yi-Moon)

Oh Seung-hyun

(Min Joo-Kyung)

Jeong In-gi

(Jung-Nam)

Hwang Hee

(Lee Yoo-jun)

Jung Min-ah

(Kang Mi-Rae)

Chun Young-min

(Lee Da-hae)

Kwon Hwa-woon

(Heo Joon)

Son San

(Hong Yun Jin)

Lee You-mi

(Na Kyung Ah)

Kim Yeong-hoon

(Han Myung Oh)

Jeong Jae-seong

(Kwon Suk)

Oh Hyun-Joong

(Kim Won Hee)

Yoon Joo-sang

(Lee Won Gil)

Jung Kyung-soon

(Yoo Joon's mother)

Park Jin-young

(Nurse)

Kim Mi-hye

(Questioner)

Noreen Joyce Guerra

(Flight attendant)

Moon Hak-jin

(Kim Jung Ho [3rd-year Resident Ophthalmology])

Jang Hee-soo

(Professor of Anesthesiology and Pain Medicine)

Yoon Chan-young

(Lee Ki Suk (A CIPA patient))

Oh Yoo-na

(Yoo Ri Hye [former actress who suffers from neuroblastoma])

Yoon Joo-sang

(Lee Won Gil [Former Minister of Health and Welfare])

Lim Dong-jin

(Shim Joon Chul)

고용화

(Lee Ki Suk's mother)

Lee Yo-seong

(Cha Yo Han's father)

Jung Ji-hoon

(Min Sung [Yoo Ri Hye's son])

Park Si-wan

(Cha Yo Han (child))

Kim Seung-hyun

(Inmate)