Numbers

Director

• 
  Kim Chil Bong

Screenwriter

• 
  Oh Hye Seok
• 
  Jung An

Main Role

• 
  L

  Jang Ho Woo

  Main Role
• 
  Choi Jin Hyuk

  Han Seung Jo

  Main Role
• 
  Choi Min Soo

  Han Je Kyun

  Main Role
• 
  Yeon Woo

  Jin Yeon Ah

  Main Role
• 
  Kim Yoo Ri

  Jang Ji Soo / Joyce Jang

  Main Role

Support Role

• 
  Lee Sung Yeol

  Shim Hyung Woo [Director- level Accountant ]

  Support Role
• 
  Bae Hae Seon

  Ahn Seung Yeon [Vice President of Taeil Accounting Audit Section]

  Support Role
• 
  Do Yeon Jin

  Song Yeo Jin[Ho Woo's chidlhood Friend]

  Support Role
• 
  Kim Sun Bin

  Gong Hee Sam [Ho Woo's chidlhood Friend]

  Support Role
• 
  Kim Young Jae

  Kang Hyeon [Taeil Accounting Audit Section]

  Support Role
• 
  Han Kyu Won

  Kim Jong Ok [Taeil Accounting Audit Section]

  Support Role
• 
  Kim Jung Joo

  Park Dong Ho [Taeil Accounting Audit Section]

  Support Role
• 
  Lee Ki Chang

  Choi Kyung Il [Taeil Accounting Audit Section]

  Support Role
• 
  Choi Jung Woo

  Yang Jae Hwan [Taeil Accounting Deal Section]

  Support Role
• 
  Park Hwan Hui

  Son Hye Won [Taeil Accounting Deal Section]

  Support Role
• 
  Seo Eun Woo

  Eun Suk Min [Taeil Accounting Deal Section]

  Support Role
• 
  Shin Woo Gyum

  Woo Sang Hyun [Taeil Accounting Deal Section]

  Support Role
• 
  Seong Byung Sook

  Woong Cheon Ja [Yeo Jin's Grandma]

  Support Role
• 
  Cho Hee Bong

  CEO Goo [Sanga Group]

  Support Role
• 
  Jung Hae Kyun

  Lee Chan Joo [Sanga Group Chairperson]

  Support Role
• 
  Joo Byung Ha

  Lee Bo Sung [Sanga Group]

  Support Role
• 
  Jung Woong In

  Lee Sung Joo [Sanga Group]

  Support Role
• 
  Bae Geu Rin

  Jung Si Young [Taeil Accounting Deal Section]

  Support Role
• 
  Yang Jae Hyun

  Do Ji Hoon [Taeil Accounting Deal Section]

  Support Role
• 
  Park Kyung Soon

  Wang Kyung Tae [Taeil Accounting Deal Section]

  Support Role
• 
  Kang Shin Il

  Jin Tae Soo [Jisan Bank]

  Support Role
• 
  Kim Kyul

  Jung Jae Ki [Jisan Bank]

  Support Role
• 
  Son In Yong

  Ma Hang Sik [Jisan Bank]

  Support Role
• 
  Oui Ji Won

  [Ji Soo's secretary]

  Support Role

Guest Role

• 
  Nam Myeong Ryeol

  Jang In Ho [CEO of Haebit Construction / Ji Soo's Father] (Ep.1, 9)

  Guest Role
• 
  Kim Ji Yul

  Jang Ji Soo [Child] (Ep. 1)

  Guest Role
• 
  Lee Yeon Joo

  [Taeil Accounting Deal Section Employee] (Ep. 1)

  Guest Role
• 
  Baek Kil Sung

  [Police officer] (Ep. 1)

  Guest Role
• 
  Jung Ki Sun

  [Haebit construction employee] (Ep. 1)

  Guest Role
• 
  Choi Eun Jun

  Jang Ho Woo [Young] (Ep. 1, 10, 12)

  Guest Role
• 
  Kil Ha Ra

  [Bank clerk] (Ep. 2)

  Guest Role
• 
  Je Seung Hyun

  [Bank clerk] (Ep. 2)

  Guest Role
• 
  Lee Jong Goo

  [Bank customer] (Ep. 2)

  Guest Role
• 
  Kim Bong Hui

  [Bank customer] (Ep. 2)

  Guest Role
• 
  Park Soo Jin

  [Kang Hyun's wife] (Ep. 2)

  Guest Role
• 
  Jo Dan

  [Hyeong Woo's son] (Ep. 2)

  Guest Role
• 
  Cha Young Ju

  [Barista] (Ep. 2, 6-7, 10-12)

  Guest Role
• 
  Kwon Dong Won

  Lee Chung Won [Taeil Accounting Lawyer] (Ep. 3)

  Guest Role
• 
  Lee Dong Gyu

  [Auction moderator] (Ep. 3)

  Guest Role
• 
  Na Ho Won

  [Angry investor] (Ep. 3)

  Guest Role
• 
  Son Sung Chan

  Sung Baek (Ep. 4)

  Guest Role
• 
  Lee Jae In

  [Soma Tech CEO] (Ep. 4-5)

  Guest Role
• 
  Lee Tae Ho

  [HK Private Equity CEO] (Ep. 5)

  Guest Role
• 
  Kim Seong In

  [Intellectual property office staff] (Ep. 5)

  Guest Role
• 
  Park Jung Eon

  Baek Mi Hyang [Cakebean] (Ep. 6)

  Guest Role
• 
  Jang Eui Don

  Yoo Min Ho [Assemblyman] (Ep. 6-7)

  Guest Role
• 
  Jin Sung Min

  [Doctor] (Ep. 7)

  Guest Role
• 
  Cha Solomon

  [Troubleshooter] (Ep. 8-9)

  Guest Role
• 
  An Jin Sol

  [Delivery company staff] (Ep. 9)

  Guest Role
• 
  Min Eung Shik

  [FSC official] (Ep. 9, 11)

  Guest Role
• 
  Min Sang Chul

  [Nuri Children's Foundation staff] (Ep. 10)

  Guest Role
• 
  Cha Young Mi

  [Jisan Bank customer] (Ep. 10)

  Guest Role
• 
  Lim Young Joon

  Jang Dong Won [Ho Woo's father] (Ep. 10, 12)

  Guest Role
• 
  Ko Kyoung Hee

  Jeon Hyun Ji [Ho Woo's mother] (Ep. 10, 12)

  Guest Role
• 
  Nam Kyung Eup

  [Taeil Accounting chairman] (Ep. 10-12)

  Guest Role
• 
  Lee Hwa Jung

  Min Soo Hyun [Prosecutor] (Ep. 11-12)

  Guest Role
• 
  Lee Chae Yoon

  [Hosu Bank CEO] (Ep. 12)

  Guest Role
• 
  Seo Kwang Jae

  [Segang Bank CEO] (Ep. 12)

  Guest Role
• 
  Gi Hwan

  [Attorney] (Ep. 12)

  Guest Role
• 
  Lee Chang Won

  [Attorney] (Ep. 12)

  Guest Role
• 
  Lee Seo Jin

  Joseph (Ep. 12)

  Guest Role
• 
  Kim Nam Yee Guest Role
• 
  Ju Il Seok

  [Employee] (Ep. 12)

  Guest Role

Unknown

• 
  Seo Yeong Su Unknown
• 
  Park Min Jae Unknown