Tell Me What You Saw

Composer

• 
  Gaemi

Director

• 
  Lee Joon Hyeong

Screenwriter

• 
  Ko Yeong Jae

Main Role

• 
  Jang Hyuk

  Oh Hyun Jae

  Main Role
• 
  Choi Soo Young

  Cha Soo Young

  Main Role
• 
  Jin Seo Yun

  Hwang Hwa Young

  Main Role

Support Role

• 
  Jang Hyun Sung

  Choi Hyung Pil [Chief / Senior superintendent]

  Support Role
• 
  Ryu Seung Soo

  Yang Man Soo [Veteran detective at RIU]

  Support Role
• 
  Shin Soo Ho

  Jang Tae Sung [Detective at RIU]

  Support Role
• 
  Ha Sung Kwang

  Cha Man Suk [Soo Young's father]

  Support Role
• 
  Eum Moon Suk

  Kang Dong Sik [Su Yeong's colleague at Patrol division]

  Support Role
• 
  Yoo Hee Je

  Lee Ji Min [Detective at RIU]

  Support Role
• 
  Kim Dong Gyun

  Park Sun Ung [Mucheon Metropolitan Police]

  Support Role
• 
  Lee Joong Yul

  [Hongwoon Police Station Chief]

  Support Role
• 
  Choi Jae Sub

  [Medical examiner]

  Support Role
• 
  Choi Hyung Joo

  Kim Yo Han

  Support Role

Guest Role

• 
  Lee Ga Hyun

  [Soo Young's friend] (Ep. 1)

  Guest Role
• 
  Shin Hyun Jong

  Kim Sung Jin [Police commissioner] (Ep. 1)

  Guest Role
• 
  Kwon Oh Jin

  [Sheep hunter] (Ep. 1-2)

  Guest Role
• 
  Kim Su In

  Cha Soo Young [Young] (Ep. 1-2, 4, 11)

  Guest Role
• 
  Kim Heung Rae

  Gang Seung Hwan [Murder Culprit] (Ep. 1-3, 6)

  Guest Role
• 
  Bae Jung Hwa

  [Soo Young's mother] (Ep. 1, 4)

  Guest Role
• 
  Song Young Gyu

  Na Jun Suk [Profiler] (Ep. 1-4)

  Guest Role
• 
  Kim Young Woong

  Chief Bang [Section chief] (Ep. 1, 6-7, 11)

  Guest Role
• 
  Kim Ba Da

  Shin Gyung Soo (Ep. 1-6, 12)

  Guest Role
• 
  Moon Sun Yong

  Kim Sang Gil [Young] (Ep. 1, 12)

  Guest Role
• 
  Lee Gyu Bok

  [Investigation Team 2 detective] (Ep. 2-4, 6)

  Guest Role
• 
  Seo Dong Gap

  [Investigation Team 2 Head] (Ep. 2-4, 6, 14-16)

  Guest Role
• 
  Lee Shi Won

  Han Yi Soo [Hyun Jae's fiancè] (Ep. 2, 5, 15)

  Guest Role
• 
  Ha Jung Min

  [Woman walking dog] (Ep. 3)

  Guest Role
• 
  Kim Seo Ha

  Jung Chan Goo [Veterinarian / Culprit] (Ep. 3-4)

  Guest Role
• 
  Lee Hyun Kyun

  Doctor Ahn (Ep. 3, 5)

  Guest Role
• 
  Park Ji Hoon

  Kim Myung Woo [Culprit] (Ep. 4)

  Guest Role
• 
  Kim Geon Ho

  [Live TV Show director] (Ep. 4)

  Guest Role
• 
  Jo Yeong Jin

  Jo Sang Gyung [Commissioner General] (Ep. 4)

  Guest Role
• 
  Jang Tae Min

  [Inn manager] (Ep. 5, 8)

  Guest Role
• 
  Kim Tae Yul

  Gil Hyun Soo [Mute kid] (Ep. 6-7)

  Guest Role
• 
  Jo Wan Ki

  Noh Sang Chul [Paedophile] (Ep. 6-8)

  Guest Role
• 
  Baek Ji Won

  Kim Na Hee [Lawyer] (Ep. 6-8)

  Guest Role
• 
  Jin Yong Wook

  [Min Joo Hyuk's father] (Ep. 7)

  Guest Role
• 
  Ha Hoe Jung

  Park Jung Woo [Culprit] (Ep. 7)

  Guest Role
• 
  Baek In Kwon

  Kim Pan Geun [Gangster] (Ep. 8)

  Guest Role
• 
  Joo Jin Mo

  Ha Tae Sik [Gang leader] (Ep. 8-9)

  Guest Role
• 
  Yoon Jong Seok

  Joo Sa Gang [Witness] (Ep. 8-9, 15)

  Guest Role
• 
  Kim Han Jong

  Cho Bang Man (Ep. 8-11)

  Guest Role
• 
  Park Yong

  [Police director - 5 years ago] (Ep. 9)

  Guest Role
• 
  Park Boo Gun

  Choi Doo Man [Gang leader] (Ep. 9)

  Guest Role
• 
  Seo Eun Woo

  Lee Yoon Jung / Lee Yoo Mi (Ep .9-10)

  Guest Role
• 
  Shin Seung Hwan

  Uhm Soo Tak (Ep. 9, 11)

  Guest Role
• 
  Lee Ki Hyuk

  Won Se Yoon [Managing Partner of Wonseo Group] (Ep. 10)

  Guest Role
• 
  Choi Ji Yeon

  [Yooseong Hospital Nurse Receptionist] (Ep. 10)

  Guest Role
• 
  Jung Soo Kyo

  Min Hyung Ju [Se Yoon's secretary] (Ep. 10)

  Guest Role
• 
  Park Ya Sung

  (Ep. 10)

  Guest Role
• 
  Kang Ae Sim

  Chim Sa Bong / Bong Yeon Ja [Financial broker] (Ep. 11-12)

  Guest Role
• 
  Yoon Sang Hwa

  Kim Sang Gil [Hit-and-run culprit] (Ep. 11-12)

  Guest Role
• 
  Heo Woong

  Lee Jong Soo (Ep. 11-13)

  Guest Role
• 
  Kyung Sung Hwan

  Kim Jung Hwan / "Dominic" (Ep. 12)

  Guest Role
• 
  Lee Kwang Se

  [Orphanage director] (Ep. 12)

  Guest Role
• 
  Oh Cho Hee

  [Sang Gil's wife] (Ep. 12)

  Guest Role
• 
  Jang Ji Hoo

  Kim Jung Hwan (Ep. 12-13)

  Guest Role
• 
  Oh Ja Hun

  Shin Gyung Soo [Child] (Ep. 12-13)

  Guest Role
• 
  Lee Ga Kyung

  Lee Ji Sun [The Guy's victim] (Ep. 12-14)

  Guest Role
• 
  Kim Jung Jin

  Shim Soo Hyun [Detective] (Ep. 13)

  Guest Role
• 
  Yoo Yong

  [NFS control room] (Ep. 13)

  Guest Role
• 
  Oh Ki Hwan

  Seo Gi Suk (Ep. 14)

  Guest Role
• 
  Kim So Yang

  [Prisoner transport officer] (Ep. 15)

  Guest Role
• 
  Kim Mi Ra

  [Doctor] (Ep. 16)

  Guest Role
• 
  Kim Seon Gyeong

  [Panel woman]

  Guest Role
• 
  Kwak Na Yeon

  [Lawyer]

  Guest Role
• 
  Song Young Ah

  [Employee]

  Guest Role
• 
  Nam Hee Soo

  [NFS staff]

  Guest Role
• 
  Ahn Joong Kwon

  Reporter Jo

  Guest Role
• 
  Kim Wang Do

  [Criminal Investigation Team]

  Guest Role
• 
  Jeon Jeong Il

  [Villager]

  Guest Role
• 
  Hwang Yun Seon

  [Press conference reporter]

  Guest Role
• 
  Xooos Guest Role
• 
  Lee Chang Won Guest Role
• 
  Lee Seung Jin Guest Role
• 
  Lee Hye Jo

  [Nurse]

  Guest Role
• 
  Yu Yeon Su

  [Female victim]

  Guest Role

Unknown

• 
  Kim Soo Yeon Unknown
• 
  Ahn Jong Min Unknown
• 
  Yoon Se Eun Unknown
• 
  Jin Jae Hee Unknown
• 
  Kwon Tae Jin Unknown
• 
  Kang Yeong Taek Unknown
• 
  Seo Dong Kyu Unknown