Heartbeat

Director

• 
  Lee Min Soo
• 
  Lee Hyun Seok

Producer

• 
  Lee Jung Mi
• 
  Hwang Eui Kyung

Producing Director

• 
  Park Gi Ho

Screenwriter

• 
  Jung Seung Joo
• 
  Kim Ha Na

Main Role

• 
  Ok Taec Yeon

  Seon Woo Hyeol

  Main Role
• 
  Won Ji An

  Joo In Hae

  Main Role
• 
  Yoon So Hui

  Na Hae Won / Yoon Hae Sun

  Main Role
• 
  Park Kang Hyun

  Shin Do Shik

  Main Role

Support Role

• 
  Ko Kyu Pil

  Park Dong Seop [Vampire]

  Support Role
• 
  Yoon Byung Hee

  Lee Sang Hae [Vampire]

  Support Role
• 
  Seung You

  Rose [Vampire]

  Support Role
• 
  Baek Seo Hoo

  Ri Man Hwi [Vampire]

  Support Role
• 
  Baek Hyeon Ju

  Ko Ki Sook [Butcher]

  Support Role
• 
  Jung Yeong Gi

  Kim Gwang Ok [Tailor]

  Support Role
• 
  Ham Tae In

  Secretary Koo [Do Shik's secretary]

  Support Role
• 
  Kim In Kwon

  Ko Yang Nam / "Cat Man"

  Support Role
• 
  Kim Do Geon

  Kim Min Jae

  Support Role

Guest Role

• 
  Park Chul Min

  Butler Joo (Ep. 1)

  Guest Role
• 
  Baek Kil Sung

  Choi Joong Chan [Attorney] (Ep. 1)

  Guest Role
• 
  Kim Mi Ran

  [Na Rae's mother] (Ep. 1)

  Guest Role
• 
  Go Yoon Bin

  [Shaded Oasis patron] (Ep. 1)

  Guest Role
• 
  Ko Gyeong Man

  [Shaded Oasis patron] (Ep. 1)

  Guest Role
• 
  Chae Yoo Hee

  [Shaded Oasis patron] (Ep. 1)

  Guest Role
• 
  Kim Tae Eon

  [Shaded Oasis patron] (Ep. 1)

  Guest Role
• 
  Kang Gu Ha

  [Detective] (Ep. 1, 3)

  Guest Role
• 
  Kim Hyun Jun

  [Shaman landlord] (Ep. 1-3)

  Guest Role
• 
  Lee So E

  Na Rae (Ep. 1, 5)

  Guest Role
• 
  Song Young Jae

  [Principal] (Ep. 1, 4-6)

  Guest Role
• 
  Park In Hwan

  [Snack shop landlord] (Ep. 1, 6, 9)

  Guest Role
• 
  Kim Ba Da

  Nobleman Shin (Ep. 1, 4, 11)

  Guest Role
• 
  Kang Suk Won

  [Doctor] (Ep. 2)

  Guest Role
• 
  Lee Jung Hyun

  [Construction site manager] (Ep. 2)

  Guest Role
• 
  Kang Hak Soo

  [Employment Agency Owner] (Ep. 3)

  Guest Role
• 
  Jo Si Yeon

  Joo In Hae [Young] (Ep. 3)

  Guest Role
• 
  Seo Hyun Chul

  Joo Dong Il [In Hae's father] (Ep. 3, 10, 13-16)

  Guest Role
• 
  Lee Shi Hoo

  [Do Shik's father] (Ep. 4)

  Guest Role
• 
  Choi Yoon Woo

  Shin Do Shik [Young] (Ep. 4)

  Guest Role
• 
  Nam Dong Ha

  [Gongcheon High School teacher] (Ep. 4)

  Guest Role
• 
  Park Byung Wook

  Kong Young Soo [Gongcheon High School Security] (Ep. 4)

  Guest Role
• 
  Jang Yeon Ik

  [Gongcheon High School custodian] (Ep. 4)

  Guest Role
• 
  Jin Sung Min

  [Gongcheon High School teacher] (Ep. 4)

  Guest Role
• 
  Lee Yoon Sang

  [Cardiologist] (Ep. 4, 9)

  Guest Role
• 
  Kim Yoon Seol

  [Gongcheon High School student] (Ep. 5)

  Guest Role
• 
  Oh Jin Kyoung

  [Gongcheon High School student] (Ep. 5)

  Guest Role
• 
  Maeng Bong Hak

  [Job interviewer] (Ep. 6)

  Guest Role
• 
  Kim Hye Jung

  [Landlord] (Ep. 6)

  Guest Role
• 
  Lee Eun Ju

  [Bedding store employee] (Ep. 7)

  Guest Role
• 
  Min Woo Gi

  [Flower delivery man] (Ep. 8)

  Guest Role
• 
  Jang Seo Yeon

  Hwang So Yi [Shaded Oasis Guesthouse 201 Guest] (Ep. 8-13, 16)

  Guest Role
• 
  Jun Joon Woo

  [Cleanup crew member] (Ep. 9)

  Guest Role
• 
  Choi Dae Chul

  [Shaded Oasis Guesthouse 202 Guest] (Ep. 9)

  Guest Role
• 
  Tak I On

  [So Yi's ex-boyfriend] (Ep. 12-13)

  Guest Role
• 
  Shin Hee Gook

  [Imprisoned man] (Ep. 13)

  Guest Role
• 
  Lee Jung Joo

  [Hae Won's attorney] (Ep. 14)

  Guest Role
• 
  Ji Sung Geun

  [Resident] (Ep. 15)

  Guest Role
• 
  Song Da Kyung

  [Interviewer] (Ep. 16)

  Guest Role
• 
  Park Soo Jin

  [In Hae's mother]

  Guest Role
• 
  Kim Do Ah Guest Role
• 
  Seo Jun

  Hyang Geun

  Guest Role
• 
  Heo Jin

  [Cellphone service staff] (Ep. 15)

  Guest Role
• 
  Jung Hee Young

  [Resident] (Ep. 15)

  Guest Role
• 
  Lee Yu Ju

  [Bank teller]

  Guest Role