Mental Coach Jegal

Director

• 
  Son Jung Hyun
• 
  Kim Tae Yub

Screenwriter

• 
  Kim Ban Di

Main Role

• 
  Jung Woo

  Je Gal Kil

  Main Role
• 
  Lee You Mi

  Cha Ga Eul

  Main Role
• 
  Kwon Yul

  Goo Tae Man

  Main Role
• 
  Park Se Young

  Park Seung Ha

  Main Role
• 
  Moon You Kang

  Lee Moo Gyul

  Main Role

Support Role

• 
  Cha Soon Bae

  Song Ji Man

  Support Role
• 
  Yoon Joo Sang

  Je Gal Han Ryang

  Support Role
• 
  Kim Do Yoon

  Cha Moo Tae

  Support Role
• 
  Moon Sung Keun

  Park Seung Tae

  Support Role
• 
  Kil Hae Yeon

  Sim Bok Ja

  Support Role
• 
  Kim Jong Tae

  CEO Kang

  Support Role
• 
  Won Tae Min

  Han Dong Jin

  Support Role
• 
  Choi Hee Jin

  Choi Yeo Jeong

  Support Role
• 
  Lee Jin Yi

  Choi Soo Ji

  Support Role
• 
  Kang Young Seok

  Go Young To

  Support Role
• 
  Heo Jung Min

  Pistol Park

  Support Role
• 
  Jung Kang Hee

  Oh Bok Tae

  Support Role
• 
  Heo Jung Do

  Oh Dal Sung

  Support Role
• 
  Park Han Sol

  Oh Sun Ah

  Support Role
• 
  Kim Si Eun

  Jo Ji Young

  Support Role
• 
  Kim Shi Eun

  Han Yeo Woon

  Support Role
• 
  Noh Ah Reum

  Mo Ah Reum

  Support Role
• 
  Hong Hwa Yeon

  Kim Moo Young

  Support Role
• 
  Jung Kyu Soo

  Go Young Pyo

  Support Role
• 
  Lee Chul Min

  Park Sang Do

  Support Role
• 
  Park Chul Min

  Jeon Chang Kil

  Support Role
• 
  Song Ji Won

  Shin Ye Ji

  Support Role
• 
  Han Woo Yul

  Yeo Sang Goo

  Support Role
• 
  Kim Yoo Jung

  Park Ji Soo

  Support Role

Guest Role

• 
  Lee So Hee

  Oh Yeon Ji (Ep. 1)

  Guest Role
• 
  Lee Cheon Mu

  Je Gal Gil [Child] (Ep. 1)

  Guest Role
• 
  Kim Ryeo Eun

  [Yeon Ji's sister] (Ep. 1)

  Guest Role
• 
  Hong Dae Sung

  [Bribed detective] (Ep. 1)

  Guest Role
• 
  Heo Yoo Ri

  [Book signing woman] (Ep. 1)

  Guest Role
• 
  Baek So Hyun

  [Book signing woman] (Ep. 1)

  Guest Role
• 
  Ju Ah Yeon

  [Book signing woman] (Ep. 1)

  Guest Role
• 
  Park Jin Young

  [Book signing woman] (Ep. 1)

  Guest Role
• 
  Oh Ki Hwan

  [Disciplinary hearing panelist] (Ep. 1)

  Guest Role
• 
  Lee Bum Chan

  [Doctor] (Ep. 2)

  Guest Role
• 
  Yoo Ji Yeon

  [Cane Finder] (Ep. 2)

  Guest Role
• 
  Gong Seo Young

  [Anchorwoman] (Ep. 2)

  Guest Role
• 
  Kim In Kwon

  [Doctor] (Ep. 3, 5)

  Guest Role
• 
  Seong No Jin

  [Reporter Jo] (Ep. 3)

  Guest Role
• 
  Lee Moo Nyoung

  [Elementary School Teacher] (Ep. 3, 13)

  Guest Role
• 
  Kim Dong Gyun

  Kim Jung Geun (Ep. 4)

  Guest Role
• 
  Hong Suk Youn

  [Monk] (Ep. 4-5)

  Guest Role
• 
  Baek Seung Hyun

  [Priest] (Ep. 4-5)

  Guest Role
• 
  Jo Ryeon

  [Pastor] (Ep. 4-5)

  Guest Role
• 
  Kim Jin Goo

  [Executive] (Ep. 4)

  Guest Role
• 
  Shin Min Soo

  [Security Guard] (Ep. 4)

  Guest Role
• 
  Park Sang Jong

  [Security Guard] (Ep. 4-5)

  Guest Role
• 
  Kwak Na Yeon

  [Cafeteria Employee] (Ep. 4)

  Guest Role
• 
  Kim Jin Ok

  [Cafeteria Employee] (Ep. 4)

  Guest Role
• 
  Yoon Hyo Sik

  [Staff] (Ep. 5)

  Guest Role
• 
  Kim Dae Kook

  [Anti-Doping Agency Staff] (Ep. 5)

  Guest Role
• 
  Gu Bon Jin

  [Staff] (Ep. 5)

  Guest Role
• 
  Park Seung Hi

  [Herself]

  Guest Role
• 
  Yoon In Jo

  [Mother]

  Guest Role
• 
  Jeon Young Mi

  [Seon Ah's mother]

  Guest Role
• 
  Kwak Myung Hwa

  [Ji Young's mother]

  Guest Role
• 
  Baek Na Gyeong

  [Skater] (Ep. 6)

  Guest Role
• 
  Kim Jang Hwan

  [Sports Commentator] (Ep. 6)

  Guest Role
• 
  Park Yong

  [Ku Tae Man's Associate] (Ep. 6)

  Guest Role
• 
  Han Ki Jang

  [Lee Kang San] (Ep. 7, 8)

  Guest Role
• 
  Jun Joon Woo

  [Prosecutor] (Ep. 8)

  Guest Role
• 
  Jo Sun Mook

  [Gymnastics federation chief] (Ep. 8)

  Guest Role
• 
  Kim Sung Yong

  [Committee member] (Ep. 9)

  Guest Role
• 
  Yang Chang Wan

  [Committee member] (Ep. 9)

  Guest Role
• 
  Jung Chung Gu

  [Shin Ye Ji's father] (Ep. 9)

  Guest Role
• 
  Lee Ji Su

  [Committee member] (Ep. 10)

  Guest Role
• 
  Sung Myung Shin

  [Kang Han Na's mother] (Ep. 11)

  Guest Role
• 
  Park Si Hyun

  [Han Ji Ah's mother] (Ep. 11)

  Guest Role
• 
  Shin Yi Joon

  Kang Han Na (Ep. 11)

  Guest Role
• 
  Lee Joo Ye

  Han Ji Ah (Ep. 11)

  Guest Role
• 
  Park Ji Ho

  [Coach] (Ep. 11)

  Guest Role
• 
  Lee Dong Wook

  [Gymnastics judge] (Ep. 11, 13)

  Guest Role
• 
  Cha Sun Hyung

  Park Seung Min (Ep. 12)

  Guest Role
• 
  Lee Jong Park

  Kim Woo Sung

  Guest Role
• 
  Kwon Dong Won

  Detective Seo Young Sik (Ep. 13, 14)

  Guest Role
• 
  Ha Nam Woo

  [Sports Policy Dept. Official] (Ep. 13)

  Guest Role
• 
  Lee Eun Kang

  [Entrepreneur] (Ep. 13)

  Guest Role
• 
  Hong A Ron

  [Thug] (Ep. 14, 15)

  Guest Role
• 
  Seo Hye Jin

  [Reporter] (Ep. 16)

  Guest Role
• 
  Do Ki Suk

  Prosecutor Seo (Ep. 16)

  Guest Role
• 
  Cha Yoo Joo

  [Reporter] (Ep. 16)

  Guest Role
• 
  Hwang Jung Yoon

  [Beauty store employee] (Ep. 16)

  Guest Role
• 
  Jung Yeon Woo

  [Athlete] (Ep. 4)

  Guest Role
• 
  Seo Ye Bin

  [Archer]

  Guest Role
• 
  An Young Mi

  [Hospital lobby woman] (Ep. 11)

  Guest Role
• 
  Cheon Hwang Sung

  [Card game hustler] (Ep. 1)

  Guest Role
• 
  Sa Hye Jin

  [Reporter] (Ep. 16)

  Guest Role
• 
  Moon Do Yun

  [Doctor] (Ep. 6, 11)

  Guest Role
• 
  Lee Jung Choon

  Gong Sang Doo

  Guest Role
• 
  Jung Yong Geom

  [Sports announcer]

  Guest Role
• 
  Won Gun Su

  [No Medal Club member]

  Guest Role
• 
  Shin Hyun Yong

  No Sang Sik (Ep. 4-5)

  Guest Role
• 
  Cho Bu Hyun

  [Investigator] (Ep. 14)

  Guest Role
• 
  Yeon Si

  [Ji Yeong's friend]

  Guest Role
• 
  Kim Kwon

  [Wrestling coach] (Ep. 4)

  Guest Role

Unknown

• 
  Kwon Hyun Hee

  (Ep. 14)

  Unknown