Doom at Your Service

Director

• 
  Kwon Young Il

Screenwriter

• 
  Im Me A Ri

Main Role

• 
  Park Bo Young

  Tak Dong Gyeong

  Main Role
• 
  Seo In Guk

  Kim Sa Ram / "Myeol Mang"

  Main Role
• 
  Lee Soo Hyuk

  Cha Ju Ik

  Main Role
• 
  Kang Tae Oh

  Lee Hyeon Gyu

  Main Role
• 
  Shin Do Hyun

  Na Ji Na

  Main Role

Support Role

• 
  Da Won

  Tak Seon Gyeong [Dong Gyeong's younger brother]

  Support Role
• 
  Woo Hee Jin

  Kang Su Ja [Dong Gyeong's aunt] / Kang Su A [Dong Gyeong's mother]

  Support Role
• 
  Jung Ji So

  "So Nyeo Sin" [Deity]

  Support Role
• 
  Song Joo Hee

  Cho Ye Ji [Editorial team chief]

  Support Role
• 
  Choi So Yoon

  Kim Da In [Editorial team member]

  Support Role
• 
  Park Tae In

  Park Jeong Min [Editorial team new recruit]

  Support Role
• 
  Song Jin Woo

  Park Chang Sin [Life Story CEO]

  Support Role
• 
  Nam Da Reum

  Park Yeong / "Young Prince" [Writer]

  Support Role
• 
  Lee Seung Joon

  Jung Seung Jun / "Jung Dang Myeong" [Dong Gyeong's neurologist]

  Support Role
• 
  Daniel C. Kennedy

  Kevin [Su Ja's husband]

  Support Role

Guest Role

• 
  Shin Soo Hyun

  [Nurse] (Ep. 1)

  Guest Role
• 
  Lee Dong Gyu

  [YBN announcer] (Ep. 1)

  Guest Role
• 
  Kim Hyo Myung

  [Subway pervert] (Ep. 1)

  Guest Role
• 
  Kang Jung Yun

  [Hospital lobby woman] (Ep. 1)

  Guest Role
• 
  Kim Baek Ri

  [Dae Han's wife] (Ep. 1-2)

  Guest Role
• 
  Hong In

  [Stabbing suspect] (Ep. 1-2, 4)

  Guest Role
• 
  Moon Chang Wan

  Tak Jong Won [Dong Gyeong's father] (Ep. 1, 3)

  Guest Role
• 
  Choi Gyo Shik

  [Dong Gyeong's relative] (Ep. 1, 3)

  Guest Role
• 
  Eom Ok Ran

  [Dong Gyeong's relative] (Ep. 1, 3)

  Guest Role
• 
  Lee Young Joo

  [Dong Gyeong's relative] (Ep. 1, 3)

  Guest Role
• 
  Park Jae Joon

  Tak Seon Gyeong [Young] (Ep. 1, 3, 7)

  Guest Role
• 
  Lee Ye Seo

  Tak Dong Gyeong [Young] (Ep. 1, 3, 7-8, 10)

  Guest Role
• 
  Kim Ji Su

  [Nurse] (Ep. 1, 6)

  Guest Role
• 
  Oh Nan Ju

  [Shaman] (Ep. 2)

  Guest Role
• 
  Ryu Yeon Seok

  [Photographer] (Ep. 2)

  Guest Role
• 
  Yoon Tae Soo

  [Restaurant waiter] (Ep. 2)

  Guest Role
• 
  Kim Ji Suk

  Cho Dae Han [Dong Gyeong’s ex-boyfriend] (Ep. 2-3)

  Guest Role
• 
  Heo Jae Ho

  "Jijo King" [Writer] (Ep. 2-3, 7, 10)

  Guest Role
• 
  Lee Ja Ryoung

  [Doomsday pamphlet woman] (Ep. 2, 4)

  Guest Role
• 
  Son Woo Hyun

  "Siberia" [Writer] (Ep. 3)

  Guest Role
• 
  Park Min Young

  [Doctor] (Ep. 3)

  Guest Role
• 
  Han Ye Ri

  [Patient] (Ep. 3, 6)

  Guest Role
• 
  Yoon Bok Sung

  [Judge] (Ep. 4)

  Guest Role
• 
  Kim Seoung Woo

  [Passerby] (Ep. 4)

  Guest Role
• 
  Uhm Ja Yoon

  [Prison officer] (Ep. 4)

  Guest Role
• 
  Yeon Je Hun

  (Ep. 4-5)

  Guest Role
• 
  Im Yong Soon

  [Wedding celebration man] (Ep. 5)

  Guest Role
• 
  Yoo Sung Yeol

  [Alumnus] (Ep. 6)

  Guest Role
• 
  Jang Young Hyun

  [Alumnus] (Ep. 6)

  Guest Role
• 
  Kwon Soo Hyun

  [Dong Gyeong's date] (Ep. 6)

  Guest Role
• 
  Lee Jae Eun

  [Patient] (Ep. 6, 11-12, 20)

  Guest Role
• 
  Yoo Ha Bok

  [Ju Ik's father] (Ep. 6, 9, 13)

  Guest Role
• 
  Park Sang Hyun

  [Toshino Publishing staff] (Ep. 7)

  Guest Role
• 
  Oh Yeon Ah

  "Dalgona" [Writer] (Ep. 7-8, 10, 12)

  Guest Role
• 
  Je Seung Hyun

  [Employee] (Ep. 8)

  Guest Role
• 
  Richard Kim

  [Teacher] (Ep. 9)

  Guest Role
• 
  Park Bo Eun

  [Shoes saleswoman] (Ep. 9)

  Guest Role
• 
  Seon Ah Rin

  [Handbag customer] (Ep. 9)

  Guest Role
• 
  Park Seung Joon

  [Graduating student] (Ep. 9)

  Guest Role
• 
  Lee Young Hee

  [Student's grandmother] (Ep. 9)

  Guest Role
• 
  Lee Hwang Ui

  [Random guy talking to Myul Mang about flowers] (Ep. 9)

  Guest Role
• 
  Lee Si Young

  [Medical receptionist] (Ep. 11)

  Guest Role
• 
  Shin Moon Sung

  [Arsonist] (Ep. 12)

  Guest Role
• 
  Jo Wan Ki

  [Murderer] (Ep. 12)

  Guest Role
• 
  Choi Moon Kyung

  [Hair stylist] (Ep. 13)

  Guest Role
• 
  Jeon Ah Hee

  [Pregnant patient] (Ep. 16)

  Guest Role