The First Responders

Director

• 
  Shin Kyung Soo

Producer

• 
  Park Young Soo
• 
  Kim Yong Jin

Screenwriter

• 
  Min Ji Eun

Main Role

• 
  Kim Rae Won

  Jin Ho Gae

  Main Role
• 
  Son Ho Jun

  Bong Do Jin

  Main Role
• 
  Gong Seung Yeon

  Song Seol

  Main Role

Support Role

• 
  Kang Seo Ha

  Kang Seo Ha [Fire station staff]

  Support Role
• 
  Hwang Young Hee

  Hee Sook [Nurse]

  Support Role
• 
  Kang Gi Doong

  Pil Gong Myung [Ho Gae's partner]

  Support Role
• 
  Jung Jin Woo

  Choi Ki Soo [Taewon fire stn.]

  Support Role
• 
  Ji Woo

  Bong An Na [Do Jin's sister]

  Support Role
• 
  Son Ji Yoon

  Yun Hong [NFS]

  Support Role
• 
  Woo Mi Hwa

  Dok Ko Soon [Taewon fire stn.]

  Support Role
• 
  Seo Hyun Chul

  Baek Cham [Detective team leader]

  Support Role
• 
  Jo Seung Yun

  Jin Cheol Joong [Prosecutor]

  Support Role
• 
  Lee Woo Je

  Han Dong Woo [Taewon fire stn.]

  Support Role
• 
  Lee Do Yeop

  Ma Tae Hwa

  Support Role
• 
  Jung Wook Jin

  Choi Seok Doo [Tae Hwa's subordinate]

  Support Role
• 
  Lee Hwa Jung

  Han Soo Jin [Doctor]

  Support Role
• 
  Heo Ji Won

  Kwak Kyung Joon [Nurse]

  Support Role
• 
  Jeon Gook Hwan

  Ma Jung Do [Assemblyman]

  Support Role
• 
  Seo Jae Kyu

  Yeom Sang Goo [Prosecutor]

  Support Role
• 
  Yoo Byung Hoon

  Moon Young Soo [Detective]

  Support Role
• 
  Yang Jong Wook

  Cha Jae Hee [Doctor]

  Support Role
• 
  Jo Hee Bong

  Yang Chi Young [Lawyer]

  Support Role
• 
  Kwon Do Ha

  Kwon Do Ha [Taewon fire stn.]

  Support Role
• 
  Baek In Joo

  Baek In Joo [Taewon fire stn.]

  Support Role
• 
  Cha Yoon Ho

  Lee Ji Hoon [Taewon fire stn.]

  Support Role
• 
  Kim Hae Ri

  [Medical examiner]

  Support Role

Guest Role

• 
  Lee Yoon Hee

  Lim Pil Gyu [Police chief] (Ep. 1)

  Guest Role
• 
  Lee Ji Won

  Kim So Hee [Kidnapping victim] (Ep. 1)

  Guest Role
• 
  Kim Jung Ho

  [Angry motorist] (Ep. 1)

  Guest Role
• 
  Choi Ja Woon

  [Restaurant boy] (Ep. 1)

  Guest Role
• 
  Kim So Woon

  [Hyun Seo's mother] (Ep. 1-2)

  Guest Role
• 
  Yoon Seok Hyun

  Cho Doo Chil (Ep. 1, 6)

  Guest Role
• 
  Yoon Seo Hyun

  Cho Man Sik (Ep. 2)

  Guest Role
• 
  Kim Min Seo

  Kim Hyeon Seo (Ep. 2)

  Guest Role
• 
  Cha Sung Je

  Yang Joon Tae (Ep. 2)

  Guest Role
• 
  Bae Jae Hyun

  Kim Dong Gyu (Ep. 2)

  Guest Role
• 
  Kim Sa Hun

  [Reporter] (Ep. 2)

  Guest Role
• 
  Han Ji An

  [Tae Hwa's son] (Ep. 2)

  Guest Role
• 
  Nahmkoong Lin

  [Man Sik's daughter] (Ep. 2)

  Guest Role
• 
  Lee Tae Geom

  [Damaged car owner] (Ep. 2)

  Guest Role
• 
  Choi Ji Won

  [Hyun Seo's classmate] (Ep. 2)

  Guest Role
• 
  Park Seo Jin

  [Hyun Seo's classmate] (Ep. 2)

  Guest Role
• 
  Choi Eun Seo

  [Hyun Seo's classmate] (Ep. 2)

  Guest Role
• 
  Kwak Myung Hwa

  [Tae Hwa's wife] (Ep. 2, 9)

  Guest Role
• 
  Won Woo Jun

  Park Tae Hoon (Ep. 3)

  Guest Role
• 
  Noh Susanna

  Woo Mi Young (Ep. 3)

  Guest Role
• 
  Hong Ho Chan

  [Police officer] (Ep. 3)

  Guest Role
• 
  Jeon Jae Hong

  [Mi Young's co-worker] (Ep. 3)

  Guest Role
• 
  Kim Su A

  Choi Ye Seul (Ep. 4)

  Guest Role
• 
  Lee Jin Hee

  Joo Young Soo (Ep. 4)

  Guest Role
• 
  Lee Seok Jun

  Um Dong Chul (Ep. 4)

  Guest Role
• 
  Kim Byung Soon

  [Lawyer] (Ep. 4)

  Guest Role
• 
  Seo Ho Chul

  [Mechanic] (Ep. 4)

  Guest Role
• 
  Park Jin Soo

  [Insurance agent] (Ep. 4)

  Guest Role
• 
  Ham Yeon Ji

  [Kindergarten teacher] (Ep. 4)

  Guest Role
• 
  Choi Jae Hwan

  [Deliveryman] (Ep. 4-5)

  Guest Role
• 
  Moon Won Ju

  Kwak (Ep. 5)

  Guest Role
• 
  Seo Chang Ho

  Bang Pil Gu (Ep. 5)

  Guest Role
• 
  Kim Sang Bo

  [Criminal] (Ep. 5)

  Guest Role
• 
  Seon Yul U

  [Detective] (Ep. 5)

  Guest Role
• 
  Min Kyung Ok

  [Yu Bi's mother] (Ep. 5)

  Guest Role
• 
  Ji Hyun Joon

  Kim Do Hyung (Ep. 5, 7)

  Guest Role
• 
  Jung Sun Chul

  [Loan shark boss] (Ep. 5, 7)

  Guest Role
• 
  Lee Ho Yeol

  [Detective] (Ep. 6)

  Guest Role
• 
  Kang Chae Min

  [Butane gas boy] (Ep. 6)

  Guest Role
• 
  Jung Kyu Soo

  [Homeless man] (Ep. 6)

  Guest Role
• 
  Jun Joon Woo

  [NFS medical examiner] (Ep. 6)

  Guest Role
• 
  Park Wan Kyu

  Ko Doo Man (Ep. 6-7)

  Guest Role
• 
  Lee Jung Hun

  Song Jae Jun [Judge] (Ep. 6, 9)

  Guest Role
• 
  Lee Jong Nam

  [Hyun Seo's grandmother] (Ep. 6, 8, 11)

  Guest Role
• 
  Bae Kang Min

  Min [Detective] (Ep. 7)

  Guest Role
• 
  Yoo In Hyuk

  Kim Cha Hyung [Enforcer] (Ep. 7)

  Guest Role
• 
  Hyun Seung Jin

  [Pharmacist] (Ep. 7)

  Guest Role
• 
  Chu Yeon Gyu

  [Insurance agent] (Ep. 7)

  Guest Role
• 
  Jang In Ho

  [Medical waste staff] (Ep. 7)

  Guest Role
• 
  Park Min Jung

  Seok Mi Jung (Ep. 8)

  Guest Role
• 
  Lee Chae Min

  [Assemblyman Ma's aide] (Ep. 8)

  Guest Role
• 
  Park Jin Young

  [Reporter] (Ep. 9)

  Guest Role
• 
  Bo Ra Na

  [Sang Woo's mother] (Ep. 9)

  Guest Role
• 
  Jin Tae Yeon

  [Young Min's mother] (Ep. 9)

  Guest Role
• 
  Kwak Jin

  [Apartment building staff] (Ep. 9)

  Guest Role
• 
  Lee Yoon Woo

  Kim Ji Han (Ep. 9-10)

  Guest Role
• 
  Kwak Ji Hye

  Song Ha Eun (Ep. 9-10)

  Guest Role
• 
  Yoo Sung Min

  Oh Soo Hyun (Ep. 9-10)

  Guest Role
• 
  Shin Ki Joon

  Song Min Jun (Ep. 9-10)

  Guest Role
• 
  Jo Yong Jin

  Oh Seung Jun (Ep. 9-10)

  Guest Role
• 
  Choi Hee Jin

  Bang Ja Gyeong (Ep. 9-10)

  Guest Role
• 
  Choi Hyung Joo

  Park Sang Woo (Ep. 9-10)

  Guest Role
• 
  Bae Min Jun

  Kang Young Min (Ep. 9-10)

  Guest Role
• 
  So Joon Sung

  Ko Kyung Seok [Teacher] (Ep. 9-10)

  Guest Role
• 
  Kwon Jae Hwan

  [Principal] (Ep. 9-10)

  Guest Role
• 
  Eun Hee Soo

  [Clinic receptionist] (Ep. 9-10)

  Guest Role
• 
  Huh Kkotbunhong

  Soo Yeon (Ep. 10)

  Guest Role
• 
  Lee Yang Hee

  [Professor] (Ep. 10)

  Guest Role
• 
  Jo Dong In

  [Boyfriend] (Ep. 10)

  Guest Role
• 
  Kim So Min

  [ER patient] (Ep. 10)

  Guest Role
• 
  Lee So E

  Kim Hyun Seo (Ep. 10-12)

  Guest Role
• 
  Jeon Hyun Ah

  [Mujin Hospital doctor] (Ep. 11)

  Guest Role
• 
  Kwon Je In

  Hwang Jung Soon (Ep. 12)

  Guest Role
• 
  Park Si Won

  Bong Do Jin [Young] (Ep. 12)

  Guest Role
• 
  Hong Dong Young

  Kang Do Ha [Do Jin's friend] (Ep. 12)

  Guest Role
• 
  Yoon Sang Hwa

  [Dochoon villa fire victim] (Ep. 12)

  Guest Role
• 
  Goo Shi Yeon

  [Septic tank fire apt. resident] (Ep. 12)

  Guest Role
• 
  Kim Sae Rom

  [Nurse]

  Guest Role
• 
  Shin Hyun Sil

  [Loanshark employee]

  Guest Role
• 
  Kim Young Mi

  [English speaking mother]

  Guest Role
• 
  Im Seung Gyu

  [Crime scene investigator]

  Guest Role