Dog Knows Everything

Director

• 
  Kim Yu Jin

Main Role

• 
  Lee Soon Jae

  Lee Soon Jae

  Main Role
• 
  Kim Yong Gun

  Kim Yong Gun

  Main Role
• 
  Ye Soo Jung

  Ye Soo Jung

  Main Role
• 
  Im Chae Moo

  Im Chae Moo

  Main Role
• 
  Song Ok Sook

  Song Ok Sook

  Main Role

Support Role

• 
  Park Sung Woong

  Lee Gi Dong [Sun Jae's son]

  Support Role
• 
  Kim Ji Young

  Hong Eun Ha [Cho Won's mother]

  Support Role
• 
  Yeon Woo

  Hong Cho Won [Police officer]

  Support Role
• 
  Lee Soo Kyung

  Kim Se Gyeong [Yong Gun's daughter]

  Support Role
• 
  Gong Chan

  Kang Min U [Café part timer]

  Support Role
• 
  Nam Yoon Su

  Hyun Ta [Idol actor]

  Support Role
• 
  Son Byung Ho

  Park Geun Su

  Support Role
• 
  Tae Hang Ho

  Yook Dong Gu [Detective]

  Support Role
• 
  Kim Ki Doo

  Park Yeong Chun [Detective]

  Support Role
• 
  Lee Jong Hyuk

  Kim Cheol Seok [Sun Jae's manager]

  Support Role

Guest Role

• 
  Jung Min Sung

  Director Baek

  Guest Role
• 
  Kim Yong Ho

  [Crime scene investigator] (Ep. 1)

  Guest Role
• 
  Han Seung Yoon

  [Wardrobe staff] (Ep. 1)

  Guest Role
• 
  Park Jong Wook

  Hwang Ju Hwang (Ep. 1)

  Guest Role
• 
  Kim Ah Young

  Jjumi (Ep. 1)

  Guest Role
• 
  Kwon Hae Sung

  [Doctor] (Ep. 1)

  Guest Role
• 
  Cha Young Mi

  [Housekeeper] (Ep. 1)

  Guest Role
• 
  Lee Chang Jik

  [Inn owner] (Ep. 1)

  Guest Role
• 
  Lee Eun Ju

  [Restaurant worker] (Ep. 3)

  Guest Role
• 
  Ryu Hae Jun

  Park Oe Su (Ep. 3-4)

  Guest Role
• 
  Ahn Hyun Ho

  Yang Jin Man (Ep. 3-4)

  Guest Role
• 
  Lee Yoo Jin

  Son Myeong Ok (Ep. 3-4)

  Guest Role
• 
  Yeon Je Hyung

  Hwang Jong Kuk (Ep. 3-4)

  Guest Role
• 
  Kim Jin Ok

  [Jin Sun’s owner] (Ep. 3-4)

  Guest Role
• 
  Seo Ji Suk

  Hwang Bin (Ep. 4)

  Guest Role
• 
  Ko Na Yul

  [Market boy] (Ep. 4)

  Guest Role
• 
  Cha Geon Woo

  [Police officer] (Ep. 4)

  Guest Role
• 
  Kim Jong Yoon

  [Grocery shopper] (Ep. 4)

  Guest Role
• 
  Lee Hye Jo

  [Grocery shopper] (Ep. 4)

  Guest Role
• 
  Kim Byung Chun

  Park Ho Cheol (Ep. 5)

  Guest Role
• 
  Yoo Hyo Jong

  Kwang Chang Hun (Ep. 5)

  Guest Role
• 
  Kim Pan Kyum

  [Min Ji’s father] (Ep. 5)

  Guest Role
• 
  Shin Min Soo

  [Table tennis player] (Ep. 5)

  Guest Role
• 
  Hong Suk Youn

  [Table tennis player] (Ep. 5)

  Guest Role
• 
  Jung Ma Rin

  [Table tennis player] (Ep. 5)

  Guest Role
• 
  Lee Jae Woong

  [Convenience store customer] (Ep. 5)

  Guest Role
• 
  Jung Bo Min

  Hong Ji Su (Ep. 5-6)

  Guest Role
• 
  Hwang Jung Min

  Yang Won Hui (Ep. 5-6)

  Guest Role
• 
  Lim Young Joon

  [Won Hui’s son] (Ep. 5-6)

  Guest Role
• 
  Myung Jae Hwan

  [Won Hui’s son] (Ep. 5-6)

  Guest Role
• 
  Lee Dong Won

  Ha Yun Jeong

  Guest Role
• 
  Shin Young Kyu

  [Police officer]

  Guest Role
• 
  Suh Ji Ho

  [Middle school girl]

  Guest Role
• 
  Baek Jin Wook

  Yun Ha Neul (Ep. 6)

  Guest Role
• 
  Kim Ra On

  Yong Bin (Ep. 6, 10)

  Guest Role
• 
  Lee Hwang Ui

  Lee Yeong Su (Ep. 6)

  Guest Role
• 
  Woo Hyun

  Lee Yeong Su (Ep. 6)

  Guest Role
• 
  Jo Ah Ra

  [Yong Bin’s mom] (Ep. 6, 10)

  Guest Role
• 
  Choi Seol A

  [Playground girl] (Ep. 6)

  Guest Role
• 
  Yu Hwan

  Song Yeong Hun (Ep. 7)

  Guest Role
• 
  Kim Ye Bin

  Nam Ro A (Ep. 7)

  Guest Role
• 
  Lee Woo Shin

  [Restaurant owner] (Ep. 7)

  Guest Role
• 
  Kim Han Kyu

  [Restaurant owner] (Ep. 7)

  Guest Role
• 
  Joey Albright

  [Grace’s owner] (Ep. 7)

  Guest Role
• 
  Lee Ho Jin

  [Min Ji’s mom] (Ep. 5)

  Guest Role
• 
  Park Won bin

  Nam Yun Jae (Ep. 7)

  Guest Role
• 
  Jo Eun Sol

  Im Yun Chae (Ep. 9)

  Guest Role
• 
  Jo Bum Joon

  [Chae Mu’s son] (Ep. 9)

  Guest Role
• 
  Lee Hyun

  [Restaurant owner] (Ep. 9)

  Guest Role
• 
  Ahn Chan Woong

  [Lottery shop couple] (Ep. 9)

  Guest Role
• 
  Go In Beom

  Bae Won Man (Ep. 10)

  Guest Role
• 
  Song Tae Yoon

  Gwang Man Se (Ep. 10)

  Guest Role
• 
  Baek Jun Yeol

  Im Chae Mu [Young] (Ep. 10)

  Guest Role
• 
  Kim Jung

  Ye Soo Jung [Young] (Ep. 10)

  Guest Role
• 
  Park Hui Sun

  [Hyeon Su's mother] (Ep. 11)

  Guest Role
• 
  Han Sang Bong

  Yang Gyu Bin (Ep. 10)

  Guest Role
• 
  Jung Ho Won

  [Actor] (Ep. 11)

  Guest Role

Unknown

• 
  Chu Jeong Min Unknown

Voice Actor

• 
  Bae Jung Nam

  Sophie [Dog]

  Voice Actor