Train

Director

• 
  Lee Seung Hoon

Editor

• 
  Steve M. Choe

Screenwriter

• 
  Park Ga Yun

Main Role

• 
  Yun Si Yun

  Seo Do Won

  Main Role
• 
  Gyeong Su Jin

  Han Seo Gyeong

  Main Role
• 
  Shin So Yool

  Lee Jung Min

  Main Role

Support Role

• 
  Lee Hang Na

  Oh Mi Sook [Section chief detective]

  Support Role
• 
  Nam Moon Chul

  Seo Jae Cheol [Do Won's father]

  Support Role
• 
  Jo Wan Ki

  Woo Jae Hyuk [Detective]

  Support Role
• 
  Kim Dong Young

  Kim Jin Woo [Detective]

  Support Role
• 
  Choi Seung Yoon

  Dr. Suk Min Joon (Ep. 5-12)

  Support Role
• 
  Yoon Bok In

  Jo Young Ran [Seo Kyung's stepmother]

  Support Role
• 
  Cha Yeob

  Lee Sung Wook [Seo Kyung's stepbrother]

  Support Role
• 
  Kim Jin Seo

  Han Kyu Tae [Seo Kyung's father]

  Support Role
• 
  Baek Jae Woo

  Kang Joon Young [Detective]

  Support Role
• 
  Lee Jae In

  [Detective / World B]

  Support Role
• 
  Lee Min Jae

  Seo Do Won [Young]

  Support Role
• 
  Im Chae Hyun

  Han Seo Kyung [Young]

  Support Role
• 
  Kim Yoo Chan

  Lee Sung Wook [Young]

  Support Role

Guest Role

• 
  Kwon Han Sol

  Lee Ji Young (Ep. 1-3)

  Guest Role
• 
  Chang Ryul

  Park Tae Kyung (Ep. 1, 9)

  Guest Role
• 
  Yoo Ji Hyuk

  [Detective] (Ep. 1, 6)

  Guest Role
• 
  Park Se Hoon

  [Police officer] (Ep. 1)

  Guest Role
• 
  Shin Seung Ryul

  [Police officer] (Ep. 1)

  Guest Role
• 
  Kim Bi Bi

  [Medical examiner] (Ep. 1-2, 7)

  Guest Role
• 
  Myung Seok Geun

  Kang Dong Shik [Officer] (Ep. 2)

  Guest Role
• 
  Kang Chung Hun

  [Reporter] (Ep. 2)

  Guest Role
• 
  Oh Yoo Mi

  [Attorney] (Ep. 2)

  Guest Role
• 
  Park Mi Na

  [Caregiver] (Ep. 2)

  Guest Role
• 
  Kim Chae Hyun

  [Psychiatrist](Ep. 2)

  Guest Role
• 
  Han Myung Hwan

  [Police officer] (Ep. 2)

  Guest Role
• 
  Park Jung Won

  Park Min Kyung (Ep. 3-4)

  Guest Role
• 
  Jang Hae Song

  Lee Jin Sung (Ep. 3-4, 6)

  Guest Role
• 
  Eom Ok Ran

  Jung Hyung Hee (Ep. 3, 5-7)

  Guest Role
• 
  Kim Jung Soo

  Park Young Tae [Pastor] (Ep. 3-4)

  Guest Role
• 
  Choi Se in

  [Train girl] (Ep. 3)

  Guest Role
• 
  Park Geon Rak

  [Detective] (Ep. 3-4)

  Guest Role
• 
  Oh Ki Hwan

  [Detective] (Ep. 3-5)

  Guest Role
• 
  Jung Hyun Seok

  [Church paster] (Ep. 3)

  Guest Role
• 
  Ahn Hye Won

  [Child's mother] (Ep. 3)

  Guest Role
• 
  Lee Chae Min

  [Host club manager] (Ep. 3)

  Guest Role
• 
  Choi Nam Uk

  [Train station staff] (Ep. 3)

  Guest Role
• 
  Gi Hwan

  [Min Kyung's husband] (Ep. 4)

  Guest Role
• 
  Cha Sang Mi

  [Church flyer woman] (Ep. 4)

  Guest Role
• 
  Jun Joon Woo

  [Police Audit Section officer] (Ep. 4)

  Guest Role
• 
  Park Eun Young

  [Restaurant owner] (Ep. 5)

  Guest Role
• 
  Uhm Tae Ok

  [Ilsuk Landscaping staff] (Ep. 5-6)

  Guest Role
• 
  Park Jin Young

  [Jung Kyung Hee's daughter] (Ep. 5, 9)

  Guest Role
• 
  Jo Yong Jin

  Dong Hyeon (Ep. 6)

  Guest Role
• 
  Bae Yoo Ri

  Jo Young Ran [Young] (Ep. 6)

  Guest Role
• 
  Yoo Chae Yeon

  Han Seo Kyung [Child] (Ep. 6)

  Guest Role
• 
  Seong Chan Ho

  [Man discussing Dong Hyeon] (Ep. 6)

  Guest Role
• 
  Lim Dong Yoon

  [Junkyard man] (Ep. 7)

  Guest Role
• 
  Min Dae Shik

  [Doctor] (Ep. 8)

  Guest Role
• 
  Jang Eui Don

  Go Jae Joon (Ep. 11)

  Guest Role
• 
  Kim Jong Ho

  [Station room staff] (Ep. 11)

  Guest Role
• 
  Park Jung Min

  [Detective]

  Guest Role
• 
  Jeon Jeong Il

  [Optometrist]

  Guest Role
• 
  Byun Gun Woo

  [Police officer]

  Guest Role
• 
  Han Song Ho

  [Delivery man]

  Guest Role
• 
  Kim Dam Ho

  [Bully boy] (Ep. 10)

  Guest Role
• 
  Kim Jin Ok

  [Neighborhood woman] (Ep. 5)

  Guest Role
• 
  Lee Yook Heon

  [Convenience store owner] (Ep. 3)

  Guest Role