Three Brothers (TV series)

Kim Soon-kyung is a retired police officer and father of three sons, Geon-kang, Hyun-chal and Yi-sang.

Eldest son Geon-kang has experienced many trials and failures in life, including bankruptcy and divorce. He later gets remarried to his wife Chung-nan.

Middle son Hyun-chal is a successful businessman, the envy of the town and pride of his father. His wife Woo-mi often sacrifices her happiness for the benefit of their family.

Youngest son Yi-sang followed in his father's footsteps by becoming a police officer. But father and the son often clash, especially when Yi-sang marries Eo-young. Eo-young is the daughter of his father's deadly foe, an ex-convict Soon-kyung investigated and eventually arrested a long time ago.

• Park In-hwan as Kim Soon-kyung (김순경) (father)
• Lee Hyo-choon [ko] as Jeon Kwa-ja (전과자) (mother)
• Ahn Nae-sang as Kim Geon-kang (김건강) (eldest son)
  • Do Ji-won as Uhm Chung-nan (엄청난) (Geon-kang's wife)
  • Jung Yoon-seok as Jong-nam (종남) (Chung-nan's son)
• Oh Dae-gyu as Kim Hyun-chal (김현찰) (middle son, businessman)
  • Kim Hee-jung as Do Woo-mi (도우미) (Hyun-chal's wife)
  • Kim Jin-seong as Kim Hyun-soo (김혼수) (Hyun-chal and Woo-mi's older son)
  • Kwon Min-jong [ko] as Kim Sang-tae (김상태) (Hyun-chal and Woo-mi's younger son)
• Lee Joon-hyuk as Kim Yi-sang (김이상) (youngest son, police officer)

• Oh Ji-eun as Joo Eo-young (주어영) (Kim Yi-sang's girlfriend)
• Roh Joo-hyun as Joo Beom-in (주범인) (Eo-young's father)
• Jang Da-yoon [ko] as Joo Boo-young (주부영) (Eo-young's younger sister)
• Kim Hee-ryeong [ko] as Mrs. Joo (Eo-young's mother)

• Bang Joong-hyun [ko] as Ha Haeng-sun (하행선) (Uhm Chung-nan's ex-boyfriend)
• Lee Sang-sook [ko] as Jo Nan-ja (조난자) (Uhm Chung-nan's friend, caretaker of Jong-nam)
• Lee Bo-hee as Gye Sol-yi (계솔이) (Do Woo-mi's mother)
• Kim Ae-ran as Tae Yeon-hee (태연희) (Kim Hyun-chal's secretary)
• Lee Jang-woo as Baek Ma-tan (police officer, Kim Yi-sang's friend)
• Son Jong-beom [ko] as Yoo Chi-jang (유치장) (police officer, Kim Yi-sang's colleague)
• Lee Jung-Gil [ko] as Cho Woo-sun (최우선) (police officer, Kim Yi-sang's colleague)
• Kim Min-hyuk [ko] as Jo Sa-jung (조사중)
• Na Jong-soo [ko] as Bang Beom-yong (방범용)
• Shin Yong-kyu [ko] as Ji Koo-dae (지구대)
• Yoo Seung-bong [ko] as Lee Sang-han (이상한) (police chief)
• Yoon Joo-hee as Lee Tae-baek (이태백) (Lee Sang-han's daughter)
• Go Se-won as Wang Jae-soo (왕재수) (Joo Eo-young's ex-boyfriend)
• Im Seo-yeon [ko] as Ji Seong-mi (지성미) (Wang Jae-soo's fiancée)
• Yoo Jang-young [ko] as Na Dong-ki (나동기)
• Im Seung-dae [ko] as Intelligence Investigator (지능수사과 형사)
• Shin Sae-jin [ko]
• Son Min-hee [ko]
• Park Sung-kyun [ko]