Full cast of Twenty Five Twenty One
Choi Myeong-bin
Kim Min-chae
16 episodes
Joo Bo-young
Lee Ye-ji
16 episodes
Kim So-hyun
Adult Na Hee-do
16 episodes
Park Yoon-hee
Baek Sung-hak
16 episodes
Kim Young-sun
Yi-jin's Mother
16 episodes
So Hee-jung
Seung-wan's Mother
16 episodes
Seo Jae-hee
Shin Jae-kyung
16 episodes
Lee Ye-jin
Park Han-sol
16 episodes
Heo Ji-na
Yu-rim's Mother
16 episodes
Kim Dong-gyun
Yu-rim's Father
16 episodes
Lee Chan-jong
Seo Joong-hyuk
16 episodes
Choi Sia
Baek Su-yeong
16 episodes
Jung Hyung-suk
Kim Hak-gyu
8 episodes
Ok Joo-ri
Ahyeon Supermarket owner
5 episodes
Park Yoon
Jung Da-yeong
5 episodes
Cho Min-wook
Kwon Dung-uk
5 episodes
Lee Seon-gu
National fencing team coach
4 episodes
Park Jung-pyo
Yi-jin's maternal uncle
4 episodes
Yoon Se-woong
Seo Yeong-seong
4 episodes
Moon Woo-bin
Kang Ji-soo
3 episodes
Bang Eun-jeong
Lee Da-seul
3 episodes
Jung Chung-gu
Myeongjin Book Rentals owner
3 episodes
Ok Ye-rin
Na Hee-do (young)
3 episodes
Kim Bum-joon
Ji-woong's friend
3 episodes
Kim Ha-ru
National team fencer
3 episodes
Lee Dong-kyu
UBS Network Sports anchor
3 episodes
Baek Suk-kwang
Na Sung-jin
2 episodes
Lee Jung-ok
Fencing club coach
2 episodes
Ri Min
Newspaper delivery subscriber / Chinese restaurant owner
2 episodes
Bae Seong-il
Mr. Baek's ex-employee
2 episodes
Kyung Da-eun
Ko Yu-rim (young)
2 episodes
Jo Nam-hee
Taeyang High School headmaster
2 episodes
Seo Jeong-bin
Kim Jong-chan
2 episodes
Yeon Seung-bin
Choi Won-hwan
2 episodes
Jeon Yeong
Yogurt lady
2 episodes
Lee Kyung-oh
UBS Network director
2 episodes
Han Gyu-hyuk
Kang Hak-rae
2 episodes
Garrison Farquharson-Keener
Alan Smith
2 episodes
Shin Yeon-sook
Hee-do's grandmother
2 episodes
Kim Joon-hyung
Sanga University coach
2 episodes
Yoon Ju-man
PD Park
2 episodes
Lee Si-hoo
UBS Network cameraman
2 episodes
Park Ji-ho
UBS Network documentary staff
2 episodes
Oh Choong-geun
UBS Network staff
2 episodes
Kim Tae-moon
UBS Network cameraman
2 episodes
Jeong Young-do
UBS anchorman
2 episodes
Ji Hyun-woo
Jungle Prince bassist
2 episodes
Kang Sung-hwa
Jungle Prince guitarist
2 episodes
Im Woo-chan
Jungle Prince drummer
2 episodes
Kang Seong-jin
Jungle Prince keyboardist
2 episodes
Shin Hee-cheol
Detective Kim / Builder
2 episodes
Park Ki-deok
Lee Gi-hun
2 episodes
Kwon Dan-a
National team fencer
2 episodes
Ji Yun-seong
Reporter
2 episodes
Yoon Tae-yi
Seon Jung Girls' High School Fencing Team Player
2 episodes
Park Jin-soo
Seo Hye-jin
1 episode
Kim Tae-yoo
Kim Yoo-jin
1 episode
Lee Ki-bbeum
Bo-mi's friend
1 episode
Song Young-joo
Bo-mi's friend
1 episode
Yu Bee
Yi-jin's friend
1 episode
Jang Yeon-woo
Yi-jin's friend
1 episode
Lee Ha-joo
Fencing team player
1 episode
Shin Ga-eun
Jang Chae-hee
1 episode
Lim Yong-soon
Security guard
1 episode
Kang Hak-soo
Loen Hotel employee
1 episode
Park Bu-keon
Mr. Baek's ex-employee
1 episode
Hyeon Jin
Taeyang High School teacher (Eps 2)
1 episode
Ma Jeong-pil
Taeyang High School faculty member
1 episode
Jeon Se-yong
Passerby
1 episode
You Euna
Elephant Snacks diner
1 episode
Seo Young-sam
Korean history teacher
1 episode
Jeon Soo-hwan
Mr. Kim
1 episode
Song Jae-saeng
Ms. Son
1 episode
Son Young-soon
Bus passenger
1 episode
Hong Eun-jeong
Job interviewee
1 episode
Koo Ja-geon
Job interviewee
1 episode
Choi Kyo-sik
Neighbourhood man
1 episode
Kim Nam-i
Yi-jin's paternal aunt
1 episode
Jang Jun-hyeon
Yi-jin's acquaintance / Director of Han River C&T
1 episode
Lee So-yoon
Kim Min-chae (young)
1 episode
Kim Na-in
Mover
1 episode
Lee Beom-chan
Referee
1 episode
Guk Joong-woong
Referee
1 episode
Kim Nak-kyun
Detective
1 episode
Lee Jae-woo
Photo studio owner
1 episode
Seok-hee
Sawaguchi
1 episode
Kim Ji-ho
MBS TV network employee
1 episode
Song Yo-sep
MBS TV network department head
1 episode
Jeong Jong-hoon
KBY TV network department head
1 episode
Lee Jong-gu
Diner
1 episode
Go Dong-eop
Diner
1 episode
Choi Hwa-young
Diner
1 episode
Bae Yu-ri
Hotel receptionist
1 episode
Bae Hyun-kyung
UBS Network Sports department staff
1 episode
Lee Jun-hee
Ha Byung-jin
1 episode
Park Eun-young
Neighbourhood woman
1 episode
Yun Bu-jin
Neighbourhood woman
1 episode
Goo Si-yeon
Jae-kyung's co-worker
1 episode
Kwak Myung-hwa
Fencing association executive
1 episode
Kim Seong-yong
Disciplinary committee member
1 episode
Nam Dong-ha
Disciplinary committee member
1 episode
Yoo Min-joo
Park Hye-jin
1 episode
Kim Si-kook
University teaching assistant
1 episode
Cha Yong-hwan
Hwang Ho-jin
1 episode
Oh Il-young
Carpenter
1 episode
Jeon Jun-woo
Restaurant host
1 episode
Park Yu-mil
UBS Network staff
1 episode
Jeong Hyeon-cheol
Detective
1 episode
Do Ye-chan
Policeman
1 episode
Park Chan-young
Upset diner
1 episode
Bae Ki-beom
Upset diner
1 episode
Baek Ji-hye
Kim Da-mi
1 episode
Lee Sang-kyung
Yang Chan-mi (young)
1 episode
Kim Mi-hye
Shin Jae-kyung (young)
1 episode
Kim Jun-ho
Jun-ho
1 episode
Byun Yun-jeong
Ji-woong's mother
1 episode
Yang Eun-sol
Reporter
1 episode
Kim Jang-hwan
Reporter
1 episode
So Jun-seong
Reporter
1 episode
Na Ho-won
Bus driver
1 episode
Choe Min
Fencing coach
1 episode
Cha Mi-kyeong
Victim's mother
1 episode
Son Dong-soo
Sports agency employee
1 episode
Choi Nam-wook
Fencing association employee
1 episode
Kim Joo-ah
Sophia Choi
1 episode
Park Yong
9/11 survivor
1 episode
Lee Sung-il
UBS Network staff
1 episode
Ha Seung-yeon
Hospital hallway woman
1 episode
Park Se-in
Han Min-jung
1 episode
Kang Moon-kyung
UBS director 2009
1 episode
Park Bin
UBS Network staff
1 episode
Park Bo-bae
UBS Network staff
1 episode
Jaspreet Kaur
Reporter (voice)
1 episode