So Ju Yeon
Yun A Reum
Support Role
Jin Kyung
O Myeong Sim
Support Role
Kim Min Jae
Park Eun Tak
Support Role
Shin Dong Wook
Bae Mun Jung
Support Role
Byun Woo Min
Nam Do Il
Support Role
Yoon Na Moo
Jung In Su
Support Role
Lee Kyung Young
Cha Jin Man
Support Role
Im Won Hee
Jang Gi Tae
Support Role
Jung Ji Ahn
Um Hyeon Jeong
Support Role
Lee Shin Young
Jang Dong Hwa
Support Role
Lee Hong Nae
Lee Seon Ung
Support Role
Yoon Bo Ra
Ju Yeong Mi
Support Role
Park Jin Ah
Hyun Ji Hyeong
Support Role
Lee Ji Ha
[Eun Jae's mother]
Support Role
Lee Gyu Ho
Mr. Koo [Staff at Doldam Hospital]
Support Role
Kim Yong Jin
Chief Lee [Chief of Administration at Doldam Hospital]
Support Role
Ko Sang Ho
Yang Ho Jun
Support Role
Jeong Han Seol
Seong Yun
Support Role
Seo Dong Won Support Role
Sung Ryung Support Role

Lee Do Yeop
Yoo In Sik (Ep. 1)
Guest Role
Kim Bum Suk
Ko Eun Ho (Ep. 1)
Guest Role
Ha Dong Joon
Kang Sung Jin (Ep. 1)
Guest Role
Kim Byung Hee
[Coast guard] (Ep. 1)
Guest Role
Han Ji An
Kim Gyeong Su (Ep. 1-2)
Guest Role
Yoo Yu Jin
Ri Bok Yeong (Ep. 1-2)
Guest Role
Kim Chul Yoon
[North Korean defector] (Ep. 1-2)
Guest Role
Kwon Hyuk Soo
Ryu Un Gil (Ep. 2)
Guest Role
Ha Yoon Kyung
Ha Yun Gyeong [Applicant 1] (Ep. 2)
Guest Role
Lee Dong Gyu
[Anchor] (Ep. 2)
Guest Role
Ban Hye Young
[Reporter] (Ep. 2)
Guest Role
Park Joon Sang
[Reporter] (Ep. 2)
Guest Role
Jung Hyun Woo
[Electrician] (Ep. 2)
Guest Role
Joo Jong Hyuk
[Applicant 2] (Ep. 2)
Guest Role
Joo Hyun Young
[Applicant 3] (Ep. 2)
Guest Role
Moon Sang Hoon
[Applicant 4] (Ep. 2)
Guest Role
Im Sung Jae
[Job interviewee] (Ep. 2)
Guest Role
Ryu Seung Soo
[Ski jumping player's coach] (Ep. 3)
Guest Role
Kang Myung Joo
[Deceased patient's mother] (Ep. 3, 11)
Guest Role
Kim Han Sol
Jae Hyeon (Ep. 4)
Guest Role
Lim Young Joon
Jeong Min (Ep. 4)
Guest Role
Kim Sung Hyo
[Jeong Min's wife] (Ep. 4)
Guest Role
Yoon Kwan Woo
[Detective] (Ep. 4)
Guest Role
Jung Ae Hwa
[Villa resident] (Ep. 4)
Guest Role
Choi Sol Hui
[Villa resident] (Ep. 4)
Guest Role
Shin Hyun Yong
[Witness] (Ep. 4)
Guest Role
Park Ha Jun
Kim Ha Nul (Ep. 5-6)
Guest Role
Min Woo Gi
[Patient] (Ep. 5)
Guest Role
Bang Min Sun
[Cramps patient] (Ep. 5)
Guest Role
Jung Doo Won
[Cramps patient's husband] (Ep. 5)
Guest Role
Sung Jeong Seon
[Elderly patient] (Ep. 6)
Guest Role
Jang Nam Yul
[Bus terminal's cleaner / Chief Lee's uncle-in-law] (Ep. 6)
Guest Role
Ji So Young
Bae Yu Rim (Ep. 6-7)
Guest Role
Oh Ji Hye
[Yu Rim’s mother] (Ep. 6-7)
Guest Role
Hwang Jae Yeol
Detective Ko (Ep. 6, 8)
Guest Role
Lee Ji Hyun
[Sun Yeong’s mother] (Ep. 6, 9)
Guest Role
Jo Eun Sol
Jung Byeol [In Su's daughter] (Ep. 6, 16)
Guest Role
Yong Jin
[Blood transport vehicle driver] (Ep. 7)
Guest Role
Kim Kyun Ha
Choi Seok Gu (Ep. 7-8)
Guest Role
Jang Young Hyun
Heo Byeong Bae (Ep. 7-8)
Guest Role
Woo Ji Hyun
Jeon Gyeong Su [Hiker] (Ep. 7-8)
Guest Role
Park Ji Hoon
Kang Bo Seung [First lieutenant] (Ep. 7-8)
Guest Role
Lee Bong Joon
[Seok Gu's friend] (Ep. 7-8)
Guest Role
Lee Jin Hong
[Nurse] (Ep. 7-8)
Guest Role
Cha Solomon
[Thug] (Ep. 7-8)
Guest Role
Park Seung Chan
[Anesthesiologist] (Ep. 7, 16)
Guest Role
Kim Jang Hwan
[News announcer] (Ep. 8)
Guest Role
Cho Bu Hyun
[Bus accident patient] (Ep. 8)
Guest Role
Hwang Soo Min
Song Hye Jin [Reporter] (Ep. 9)
Guest Role
Jo In Woo
Choi Min Gyu [Paramedic] (Ep. 9)
Guest Role
Kim Do Hyeong
[Jin Man's chauffeur] (Ep. 9)
Guest Role
Han Ki Jang
[Firefighter] (Ep. 9)
Guest Role
Baek Kyung Min
[Dance academy student] (Ep. 9)
Guest Role
Kim Si Kook
[Records department clerk] (Ep. 9)
Guest Role
Lee Ga Yeon
Cheon So Yeong (Ep. 9-10)
Guest Role
Ha Yi An
[Student] (Ep. 9-10)
Guest Role
Yoo Sung Min
[Student] (Ep. 9-10)
Guest Role
Jo Dong In
[Math academy teacher] (Ep. 9-10)
Guest Role
Oh Min Jung
[Tteokbokki restaurant owner] (Ep. 9-10)
Guest Role
Lee Do Guk
[Firefighter] (Ep. 9-10, 15-16)
Guest Role
Lee Ki Sub
[Gyeong Suk's aide] (Ep. 9-11, 16)
Guest Role
Han Ki Joong
[Head of Jongseon] (Ep. 10)
Guest Role
Lee Jang Ho
[Paramedic] (Ep. 11)
Guest Role
Go Gun Ryung
[Interviewed patient] (Ep. 11)
Guest Role
Lee Seung Won
[Patient's guardian] (Ep. 11)
Guest Role
Jung Hee Young
[Patient's guardian] (Ep. 11)
Guest Role
Kook Joong Woong
[Patient's guardian] (Ep. 11)
Guest Role
Byun Jung Hee
Jung Geum (Ep. 11-12)
Guest Role
Kim Il Hyun
[Jin Man's colleague] (Ep. 12)
Guest Role
Bae Bo Ram
[Doctor] (Ep. 12)
Guest Role
Kim Moon Chan
[Drunk patient] (Ep. 12)
Guest Role
Yoo Yeon Seok
Kang Dong Ju (Ep. 12-16)
Guest Role
Park Joo Yong
[Fighting brother patient] (Ep. 13)
Guest Role
Kwak Jin
[Fighting brother patient] (Ep. 13)
Guest Role
Chae Song Hwa
[Car accident patient] (Ep. 13)
Guest Role
Shin Hye Ji
Min Jeong (Ep. 13-14)
Guest Role
Kim Jae Man
[Min Jeong's father] (Ep. 13-14)
Guest Role
Hong Seong Gwan
[Paramedic] (Ep. 13-15)
Guest Role
Kim Da Hwin
Officer Choi (Ep. 14-15)
Guest Role
Park Ji Hoon
[Provincial budget officer] (Ep. 14-15)
Guest Role
Han Kyu Won
Yeom Jeong Do (Ep. 14-16)
Guest Role
Kim Do Won
Heo Ye Jun (Ep. 15)
Guest Role
Kim Si On
[Ye Jun's sister] (Ep. 15)
Guest Role
Kim Ri Han
[Paramedic] (Ep. 15)
Guest Role
Lee Han Ju
[Angry patient] (Ep. 15)
Guest Role
Park Hyo Joo
Sim Hye Jin (Ep. 15-16)
Guest Role
Kim Hye Joon
Jang Hyeon Ju (Ep. 16)
Guest Role
Seo Hyun Jin
Yun Seo Jeong (Ep. 16)
Guest Role
Ryu Ye Ri
[In Su's wife] (Ep. 16)
Guest Role
Jung Woo Jae
Woo Sang Min
Guest Role
Im Jae Geun
Paramedic Heo
Guest Role
Kim Ye Rin
Cha Eun Jae [Young]
Guest Role
Oh Min Ae
Ko Gyeong Suk [Provincial member]
Guest Role
Lee Joo Young
[Nurse]
Guest Role
Moon Ah Ram
[Nurse]
Guest Role
Kang Hae Ri
[Nurse]
Guest Role
Park Hee Jung
[Nurse]
Guest Role
Jay Jira Yangyeun
[Doctor]
Guest Role
Park Sun Woo Guest Role