Cho Jung-seok
Lee Ik-jun (24 eps)
Yoo Yeon-seok
Ahn Jung-won (24 eps)
Jung Kyung-ho
Kim Jun-wan (24 eps)
Kim Dae-myung
Yang Seok-hyung (24 eps)
Jeon Mi-do
Chae Song-hwa (24 eps)
Shin Hyun-been
Jang Gyeo-wool (24 eps)
Ahn Eun-jin
Chu Min-ha (24 eps)
Kwak Sun-young
Lee Ik-sun (24 eps)
Kim Joon
Lee Woo-joo (24 eps)
Kim Hae-sook
Jeong Ro-sa (24 eps)
Jung Moon-sung
Do Jae-hak (24 eps)
Kim Hye-In
Myung Eun-won (24 eps)
Ha Yoon-kyung
Heo Sun-Bin (24 eps)
Moon Tae-yu
Yong Seok-Min (24 eps)
Choi Young-jun
Bong Kwang-Hyeon (24 eps)
Kim Soo-jin
Song Su-Bin (24 eps)
Bae Hyeon-seong
Jang Hong-do (24 eps)
Kim Kang-min
Im Chang-Min (24 eps)
Cho Yi-hyun
Jang Yoon-bok (24 eps)
Moon Hee-kyung
Jo Young-Hye (24 eps)
Cho Seung-yeon
Ju Jeon (24 eps)
Kim Kap-soo
Ju Jong-su (24 eps)
Park Han-sol
ER Nurse (24 eps)
Yang Jo-a
Hwang Jae-Shin (24 eps)
Seo Jin-won
Min Ki-Jun (24 eps)
Jeon Kwang-jin
Jong Se-Hyuk (24 eps)
Seol Yu-Jin
Eun Seon-Jin (24 eps)
Kim Ji-seong
Han Seung-Ju (24 eps)
Yoon Hye-ree
So Yi-Hyun (24 eps)
Lee Ji-won
Han Hyun-Hee (24 eps)
Kim Bi-bi
Ham Deok-Ju (24 eps)
Lee Dal
Kim Jae-Hwan (24 eps)
Lee Noah
Lee Young-Ha (24 eps)
Choi Young-woo
Cheon Myung-Tae (24 eps)
Lee Hye-eun
Guk Hae-Sung (24 eps)
Hong Seok-bin
Kwon Sun-Jeong (24 eps)
Lee Ji-hoon
Lee Ji-hun (24 eps)
Lee Chan-hyung
Choi Seong-Yeong (14 eps)
Kim Jun-han
An Chi-yong (13 eps)
Lee Su-mi
Auntie Wang (12 eps)
Shin Do-hyun
Bae Jun-Hee (12 eps)
Park Ji-yeon
Yoon Shin-hye (12 eps)
Hwang Bae-jin
Hwang Bae-Jin (12 eps)
Lee Se-hee
Kang So-Ye (12 eps)
Joo Bo-bi
Kim Da Young (12 eps)
Choi Yun-seol
Yoon Ga Hee (12 eps)
Jwa Chae-won
Nam Yoo Ri (12 eps)
Lee Jung-won
Hwang Ji-Woo (12 eps)
Nam Joong-gyu
Choi Se-Hoon (12 eps)
Lee Jong-won
Kim Geon (12 eps)
Shin Hye-kyung
[Shin Hye's mother] (12 eps)
Park Jung-In
Seo Yoon Hee (12 eps)
Lee So-yoon
Kim Tae-Yeon (12 eps)
Ahn So-yo
[Mother] (12 eps)
Jeong Jae-seong
[Chief neurosurgeon] (12 eps)
Kim Ryeo-eun
[Pregnant wife] (7 eps)
Son In-yong
[Pregnant wife's husband] (7 eps)
Park Se-jin
Hwang Du Na (5 eps)
Seo Min-Sung
[Colorectal surgeon] (4 eps)
Park Seon-ju
Hwang Min Jung (4 eps)
Lee Eun-joo
[Eun Ji's mother] (4 eps)
Park Jung-woo
Jang Ga-eul (3 eps)
Sung Dong-il
Peter [Jung Won's eldest brother] (3 eps)
Chu Yeon-gyu
Ok Gang Nam [Doctor] (3 eps)
Ko In-beom
Jang Jong Gil (3 eps)
Kim Kyu-baek
[Jong Gil's son] (3 eps)
Kim Ja-young
[Jong Gil's wife] (3 eps)
Lee Ji-hyeon
Sim Mi Jin [Min Chan's mother] (3 eps)
Choi Seung-yoon
[Song Hwa's ex-boyfriend] (2 eps)
Yoon Geumseon-ah
Baby Jae-won's Mother (2 eps)
Yoon Man-dal
[Jae Hun's father] (2 eps)
Go Ara
[Ik Jun's ex-girlfriend] (2 eps)
In-kyung Kim
[Surgical ward nurse] (2 eps)
Jang Gyeok-su
[Ji A's father] (2 eps)
Lee Chae-eun
[Ji Ah's mother] (2 eps)
Kim Gyeong-min
Mr. Jung [Tae Yang's aide] (2 eps)
Lee Seo-jun
Kim Hyun Su [Brain tumor patient] (2 eps)
Kim Hieora
An Seong (2 eps)
Jang Hye-jin
[Min Ha's mother] (2 eps)
Lee Jae-in
So Mi [Su Bin's daughter] (2 eps)
Jeong Si-yul
Dong Ju (2 eps)
Jeong Min-seong
Chang Hak (2 eps)
Park Bo-kyung
[Chang Hak's wife] (2 eps)
An Si-ha
Kim Soo Jung (2 eps)
Lee Taek-geun
[Soo Jung's husband] (2 eps)
Koh Na-young
Yoo Gyung Jin (2 eps)
Lee Ji-ha
[Gyung Jin's mother] (2 eps)
Jeon Soo Yeon
[Suk Hyung's patient] (2 eps)
Yeon Si-woo
Lee Gyung Mi (2 eps)
Park Tae-Seong
[Min Chan's father] (2 eps)
Choi Deok-moon
Chu Cheol Woo [Min Ha's father] (2 eps)
Jeong Eun-gyeong
[Du Na's mother] (2 eps)
Kim Ro-sa
[Pediatrician] (2 eps)
Yoon Bok-sung
Sun Du Ho (2 eps)
Park Se-in
Sun Seong Hui (2 eps)
Na Young-seok
Jang Young-seok [Mo Ne & Ma Ne's father] (2 eps)
Gi So-you
Seung Chae (1 eps)
Lee Joo-myung
PD Song (1 eps)
Park Seoung-tae
[Brain Cancer Patient] (1 eps)
Bae Seong-il
[Electrician] (1 eps)
Mi So-yun
[Nurse] (1 eps)
Hwang Jung-seun
[Ju Hwan's mother] (1 eps)
Hee Cheol-jung
[Bit Na's mother] (1 eps)
Park Ji-yeon
[Eun Ah's mother] (1 eps)
Hwang Young-hee
[Patient's relative] (1 eps)
Yeom Hye-ran
[Min Young's mother] (1 eps)
Ye Ji-won
[Jung Won's eldest sister] (1 eps)
Oh Yoon-ah
[Jung Won's second eldest sister] (1 eps)
Kim Sung-kyun
[Jung Won's second eldest brother] (1 eps)
Song Duk-ho
[KWMC resident] (1 eps)
Kim Kuk-hee
Gal Ba Ram (1 eps)
Shin Hee-gook
Park Jeong Su (1 eps)
Kim Sung-cheol
Noh Jin Hyeok (1 eps)
Jeong Han-bin
Han Seung Hyeok (1 eps)
Kim Han-jong
Gong Hyeong Woo ['Good Samaritan' patient] (1 eps)
Myung Jae-Hwan
[Doctor] (1 eps)
Lee Mi-eun
[Upset patient] (1 eps)
Min Kyeong-ok
[Patient] (1 eps)
Hwang Jae-yeol
[Patient's son] (1 eps)
Seo Sung-Jong
[Heart patient] (1 eps)
Kim Kyeol
[Neurosurgeon] (1 eps)
Kim Young-mi
[Jung Hu's mother] (1 eps)
Kim Dae-gon
[Ba Ram's husband] (1 eps)
Park Ok-chul
[Patient's daughter] (1 eps)
Lee Jae-Eun
[Jeong Su's guardian] (1 eps)
Kim Choo-wol
[Sung Hyuk's mother] (1 eps)
Park Hye-jin
[Patient next to Ba Ram] (1 eps)
Lee Cheon-mu
Won Jun (1 eps)
Kwon Gwi-bin
Dr. Tae In (1 eps)
Shin Joo-hyup
Jung Ho Jun (1 eps)
Chang-jik Lee
Jung Su Beom (1 eps)
Jung Yoo-min
Jung Eun Bin (1 eps)
Ki Eun-se
Yuk Hye Jung [Ik Jun's ex-wife] (1 eps)
Oh Dong-min
Yuk Hee Gwan [Ik Jun's patient] (1 eps)
Ji Min-hyuk
Hee Dong [Chan Hyung's father] (1 eps)
Lee Mi-young
[Su Bum's wife] (1 eps)
Hong Ji-hee
[Hee Gwan's wife] (1 eps)
Shim Dal-gi
[Chan Hyung's mother] (1 eps)
Kim Nam-jin
[Chan Hyeong's grandmother] (1 eps)
Ha Yi-An
Jae Hun / Jae Yong (1 eps)
Jeong Joon-hwan
[Priest] (1 eps)
Oh Nan-Ju
[Middle age female medical staff in elevator] (1 eps)
Lee Ju-a
[Teen girl discharging blood] (1 eps)
Song Kyung-hwa
[Mother of teen girl discharging blood] (1 eps)
Kim Sang-Il
Shim Yeong Ho (1 eps)
Lee Sae-byeol
[Mother in labor] (1 eps)
Anupam Tripathi
[Foreign patient's co-worker] (1 eps)
Yu Jun-a
[Yeong Ji's mother] (1 eps)
Seo Sang-Won
[Cervix patient's husband] (1 eps)
Kim Young-hee
[Waitress] (1 eps)
Lee Chae-yoon
[Su Beom's wife] (1 eps)
Choi Hyun-jun
[Heart procurement team 2] (1 eps)
Lee Tae-Ho
[Patient] (1 eps)
Heo Ji-na
[Chang Mo's mother] (1 eps)
Choe Seong-min
[Marathon announcer - Special voice appearance] (1 eps)
Kang Jong-Sung
[Ji Hyun's grandpa] (1 eps)
Kang Chung-hun
[Paramedic] (1 eps)
Son Kyoung-won
Oh Jae Il (1 eps)
Jeong Seo-yeon
[Jang Hun's wife] (1 eps)
Kim Dong-yong
[Son of patient seeing Cheon Myeong Tae] (1 eps)
Heo Soon-Mi
Kim Jae Young (1 eps)
Kim Ga-hee
Bin [Jae Il's daughter] (1 eps)
Jeong Dong-gyoo
Go Young Min [Ah Ra's father] (1 eps)
Oh Ki-hwan
[Detective] (1 eps)
Bae Yu-ri
[Social worker] (1 eps)
Yang Seung-geol
[Tae Jin's father] (1 eps)
Lee Soo-hyung
[Gun Hee's father] (1 eps)
Park Hyun-jeong
[Gun Hee's mother] (1 eps)
Yoon Byung-hee
[Jae Young's husband] (1 eps)
Yoo Yong
[Thoracic surgery doctor] (1 eps)
Lee Ji-hyeon
Shin Mi Jin (1 eps)
Kim Keum-soon
[Worried mother of patient] (1 eps)
Seo Sang-Won
[Cervix patient's husband] (1 eps)
Kim Sun-young
[Ik Jun's patient / Shop owner's wife] (1 eps)
Choi Moo-seong
[Patient's husband / 'Phoenix' shop owner] (1 eps)
Hwang Ki-seok
[Heart surgery patient / Chang Mo's father] (1 eps)
Kang Jeong-woo
Jo Moon Jung [Baby Hun's father] (1 eps)
Kim Ik-tae
Choe Jung Won [Liver cancer patient] (1 eps)
Noh Yeong-Hwa
[Jung Won's wife] (1 eps)
Jang Joo-yeon
[Pediatric Surgery Nurse] (1 eps)
Kang Chan-yang
[Visitor] (1 eps)
Kim Joo-ah
[Doctor] (1 eps)
Kim Geon-ho
[Patient] (1 eps)
Sun Yul-woo
[Patient next to painkiller patient] (1 eps)
Kwon Seung-woo
[Jae Young's husband] (1 eps)
Ahn Su-bin
[Jung Won's daughter] (1 eps)
Choi Su-rin
Oh Yu Min (1 eps)
Chae Seo-eun
Shin Mo Rin [Nursing student] (1 eps)
Shin Hyeon-jong
[Yu Min's father] (1 eps)
Lee Jun-hee
[Tae Hui's father] (1 eps)
Song Min-ji
[Tae Hui's mother] (1 eps)
Shin Chang-Joo
[Aneurysm patient] (1 eps)
Kim Sung Hyun
[Yoon Bok's boyfriend] (1 eps)
Lee Hwi-Seo
[Neuropatient discharged tomorrow] (1 eps)
Kim Hae-Gon
[Aneurysm patient's dad] (1 eps)
Chae Yoon-hee
[Aneurysm patient's mom] (1 eps)
Kim Su-A
Young Ji (1 eps)
Han Sa-myeong
Kim Hae Beom (1 eps)
Kim Kyeong-il
Hong Jeong Ho [Captain] (1 eps)
Park Ye-ni
[Interpreter] (1 eps)
Kim Baek-ri
[Young Ji’s nurse] (1 eps)
Park Eun-young
[Hae Beom's aunt] (1 eps)
Shim Hye-Rim
[Nurse] (1 eps)
Yoo Byung-sun
Im Jang Hun (1 eps)
Kim Jung-soo
[Chang Hak's father] (1 eps)
Shin Yeon-sook
[Chang Hak's mother] (1 eps)
Shin Hee-cheol
[Chang Hak's brother] (1 eps)
Lim Seung-beom
[Baby Chae Yun's father] (1 eps)
Kang Yeon-jung
[Baby Chae Yun's mother] (1 eps)
Woo Sung-min
[Child patient in elevator] (1 eps)
Kim A-ram
[Chang Hak's sister-in-law] (1 eps)
Hong Lu-hyeon
[Stillbirth mother] (1 eps)
Lee Ji-Young
Ko Jung Min (1 eps)
Go Do-yeon
Ji Hyun [Patient] (1 eps)
Hwang Hee-jung
Han Seung Hui [Pregnant woman in waiting room] (1 eps)
Song Hoon
[Patient] (1 eps)
Lim Jung-min
[Attorney] (1 eps)
Jeon Jun-woo
[Ji Hyun's father] (1 eps)
Kim Mi-hui
[Ji Hyun's mother] (1 eps)
Oh Jung-Woo
[Cirrhosis patient] (1 eps)
Kwon Hyuk Soo
[Jung Min's father] (1 eps)
Cha Mi-kyeong
Cha Mi Kyung (1 eps)
Lee Jung-yeol
[Astrocytoma patient] (1 eps)
Nam Sang-ji
[Cirrhosis patient's wife] (1 eps)
Yook Mi-Ra
[Cirrhosis Patient's mother] (1 eps)
Choi Nam-wook
[Neurosurgery patient] (1 eps)
Jang Ha-eun
[Brain hemorrhage patient's daughter] (1 eps)
Eom Ok-ran
[Astrocytoma patient's wife] (1 eps)
Woo Jeong-won
Yeom Se Hee [Doctor] (1 eps)
Lee Dong-hee
[Stroke patient] (1 eps)
Park Hye-Young
[Chae Eun's mother] (1 eps)
Cha Chung-hwa
[Yeon Woo's mother] (1 eps)
Na Chul
Kim U Jae [Doctor] (1 eps)
Bae Ki-beom
Kim Jang Ho (1 eps)
Kim Si-woo
Park Seung Won (1 eps)
Jeon Hye-yeon
[Nurse] (1 eps)
Ryu Hye-rin
[Seung Won's mother] (1 eps)
Seo Suk-kyu
[Seung Won's father] (1 eps)
Seung Eui-yeol
[Gyung Jin's father] (1 eps)
Jo A-Jin
[Restaurant waitress] (1 eps)
An Tae-rin
Ha Yul (1 eps)
Son Seung-Hoon
Cho Seon Ho (1 eps)
Lee Kyoo-hyung
Yoo Han Yang [Gyung Jin's brother] (1 eps)
Ham Sang-hoon
Son Chan Gyu (1 eps)
Lee Joon-Gyu
Kim Hyeong Jin (1 eps)
Ahn Chang-hwan
Baek Hyeong Do [Doctor] [Voice] (1 eps)
Ma Jeong-pil
[Doctor] (1 eps)
Kwon Oh-Soo
[Assemblyman] (1 eps)
Heo Seon-haeng
[Heart patient] (1 eps)
Kim Mi-ra
[Ha Yul's mother] (1 eps)
Go Han-min
[Ye Rim's husband] (1 eps)
Choi Hyo-sang
[Oncologist surgeon] (1 eps)
Kim So-woon
[Heart patient's wife] (1 eps)
Yeon Je-Hun
[Assemblyman's aide] (1 eps)
Hong Yoon-hee
[Ye Rim's mother-in-law] (1 eps)
Choi Sol-hee
[Impatient heart patient] (1 eps)
Yoon Sung-won
[Impatient heart patient's husband] (1 eps)
Seo Gwang-jae
[Recovered cancer patient] (1 eps)
Im Too-chul
[Recovered cancer patient's son] (1 eps)
Oh Eun-Seo
Ba Da (1 eps)
Chae Min-Hee
So Yeon (1 eps)
Ryu Yeon-seok
[Fellow] (1 eps)
Lee Woo-Shin
[Doctor] (1 eps)
Yoon Dan-bi
[Doctor] (1 eps)
Kim Jin
[Ba Da's mother] (1 eps)
임수정
Chae Eun (1 eps)
Lee Jeong-chan
[Jong Seop's son] (1 eps)
Han Seo-yeon
[Physical therapist] (1 eps)
Kim Jong-ho
[ASD patient] (1 eps)
이재순
[Seizure woman] (1 eps)
Park Yu-mi
[Ga Ram's mother] (1 eps)
Park Jin-seong
[Bile duct patient] (1 eps)
Kim I-san
[Son of Dr. Yang Seok Hyeong's patient] (1 eps)
Park Soo-jin-II
[Boy patient's mother] (1 eps)
Jin Sung-min
[Transfer PPH patient's husband] (1 eps)
Lee Hun-joo
[Chang Min's mother] (1 eps)
Seong Ji-won
[Nurse] (1 eps)
Lee Yeon-ju
[Surgical ward nurse] (1 eps)
Lee Seung-jun
Se Ho (1 eps)
Kim Geun-bae
[Ba Da's father] (1 eps)
Ki Hwan
[Eun Ji's father] (1 eps)
Im Jae-geun
[Ru Bin's father] (1 eps)
Jung Seo-in
[Patient from Jinhae] (1 eps)
Lee Dong-yong
[Husband from Jinhae] (1 eps)
Kim Hyun
Choi Eun Suk (1 eps)
Kim Hak-seon
[Eun Suk's husband] (1 eps)
Joe In
Kim So Young (1 eps)
Kang Hak-soo
[Patient] (1 eps)
Lee Ha-joo
[Cafe cashier] (1 eps)
Kwak Na-yeon
[Patient's wife] (1 eps)
Kim Sang-il
[Du Na's father] (1 eps)
Ahn Sang-woo
[Ik Jun's professor] (1 eps)
Goo Jae-yeon
[So Young's mother] (1 eps)
Hong Dae-Sung
[Chang Min's father] (1 eps)
Hong Eui-Joon
[So Young's husband] (1 eps)
Jung Young-keum
[So Young's mother-in-law] (1 eps)
Lim Han-bin
Han Jun (1 eps)
Han Ki-jang
[Paramedic] (1 eps)
Kim Ga-young
[Jun's mother] (1 eps)
Kang Moon-kyung
[Seong Ju's father] (1 eps)
Lee Eun-ju
[Seong Ju's mother] (1 eps)
Hong Woo-jin
[Seong Ju's brother] (1 eps)
Kim Beom-soo
[Security guard] (1 eps)
Min Ji-a
[Preterm baby's mother] (1 eps)
Kim Jong Ho
[Dr. Lee Ik Jun's patient] (1 eps)
Kang Ae-sim
[Song Hwa's mom] [Voice] (1 eps)
Lee Eun-Chae
[Suk Hyung's patient] (1 eps)
Lee Joo-sil
[Brain tumor patient] (1 eps)
Ha Seung-youn
[Transfer PPH patient] (1 eps)
Jung Seung-kil
[Brain tumor patient's son] (1 eps)
Choi Yoo-song
[Brain tumor patient's daughter] (1 eps)
Kim Jin-Bok
Ko Ju Hyeong (1 eps)
Yoo Jae-myung
Shin Sung Eui [Professor, Department of Radiology] (1 eps)
Park Soo-min
[Nurse] (1 eps)
Lee Yun-sang
[Doctor] (1 eps)
Kim Seong-yong
[Doctor] (1 eps)
Kim Su-kyung
[Min Sol's mom] (1 eps)
Lee Si-Young
[Pregnant nurse] (1 eps)
Lee Bom-so-ri
[OB-GYN fellow] (1 eps)
Kim Ki-nam
[Table tennis umpire] (1 eps)
Bae Hyun-kyung
[Dr. Shin's teammate] (1 eps)
Park Moo-yum
[Orthopedics team doctor] (1 eps)
Hyun Jung-hwa
[Nuclear medicine professor] (1 eps)
Lee Jae-in
Kang Chan Dong (1 eps)
Han Ji-hyo
[Intern] (1 eps)
Yoon Do-gun
[Intern] (1 eps)
Jang Joon-ho
[Doctor] (1 eps)
Choi Ji-yeon
[Doctor] (1 eps)
Kim Hee-chang
[Chan Dong's friend] (1 eps)
Lee Do-hye
Ki Eun Mi (1 eps)
Lee Tae-hyeong
An Sang Mo (1 eps)
Bae Min-jun
[Sang Mo's son] (1 eps)
Lee Hyo-je
[Sang Mo's son] (1 eps)
Goo Si-yeon
[Sang Mo's wife] (1 eps)
Jeon Yeo-jin
[Ho Jung's sister] (1 eps)
Yang Ha-Yoon
[Patient Sun Chun Sik's family member] (1 eps)
Jung Chung-gu
Bae Jong Seop (1 eps)
Park Jae-jun
Choi Eun Dam (1 eps)
Jo Nam-hee
[Doctor] (1 eps)
Jang Won-hyung
[Pediatrics fellow] (1 eps)
Seol Chang-hee
[Seo Joo's husband] (1 eps)
So Hee-jung
[Bae Jong Sup's wife] (1 eps)
Park Mi-sook
[Seung Chae's mother] (1 eps)
Choi Kyo-sik
[Bae Jong Sup's brother] (1 eps)
Park Seong-gyoon
[Brain hemorrhage patient's son] (1 eps)
Jang Moon-suk
[Brain hemorrhage patient's son] (1 eps)
An Hui-ju
[Brain hemorrhage patient's daughter] (1 eps)
Yoon Hyun-Gil
ASD patient's daughter (1 eps)
Ko Kyoung-hee
Ju Hyeong 's wife (1 eps)
Lee Il-sub
Sim Yeong-Su (1 eps)
Lim Ji-ho
Jae-min (1 eps)