Twenty Five Twenty One

Park Jin-soo (Seo Hye-jin), Jung Yoo-min (Hwang Bo-mi), Kim Tae-yoo (Kim Yoo-jin), Lee Ki-bbeum (Bo-mi's friend), Song Young-joo (Bo-mi's friend), Yu Bee (Yi-jin's friend), Jang Yeon-woo (Yi-jin's friend), Jung Yong-ju (Delinquent boy), Lee Ha-joo (Fencing team player), Lee Joong-ok (Fencing club coach), Ri Min (Newspaper delivery subscriber), Yoon Tae-yi (Seon Jung Girls' High School Fencing Team Player)

Shin Ga-eun (Jang Chae-hee), Lim Yong-soon (Security guard), Kang Hak-soo (Loen Hotel employee), Park Bu-keon (Mr. Baek's ex-employee), Jo Hyeon-jin (Taeyang High School teacher (Eps 2)), Ma Jeong-pil (Taeyang High School faculty member), Moon Woo-bin (Kang Ji-soo), Bang Eun-jeong (Lee Da-seul), Ok Joo-ri (Ahyeon Supermarket owner), Jung Chung-gu (Myeongjin Book Rentals owner), Bae Seong-il (Mr. Baek's ex-employee), Ok Ye-rin (Na Hee-do (young))

Moon Woo-bin (Kang Ji-soo), Bang Eun-jeong (Lee Da-seul), Jeon Se-yong (Passerby), You Euna (Elephant Snacks diner), Seo Young-sam (Korean history teacher), Seo Jeong-bin (Kim Jong-chan), Yeon Seung-bin (Choi Won-hwan)

Jung Yong-ju (Delinquent boy), Moon Woo-bin (Kang Ji-soo), Bang Eun-jeong (Lee Da-seul), Ok Joo-ri (Ahyeon Supermarket owner), Jeon Soo-hwan (Mr. Kim), Song Jae-saeng (Ms. Son), Son Young-soon (Bus passenger), Hong Eun-jeong (Job interviewee), Koo Ja-geon (Job interviewee), Choi Kyo-sik (Neighbourhood man), Kim Nam-i (Yi-jin's paternal aunt), Jang Jun-hyeon (Yi-jin's acquaintance / Director of Han River C&T)

Jung Chung-gu (Myeongjin Book Rentals owner), Seo Jeong-bin (Kim Jong-chan), Yeon Seung-bin (Choi Won-hwan), Kim Ha-ru (National team fencer), Lee Seon-gu (National fencing team coach), Lee So-yoon (Kim Min-chae (young)), Kim Na-in (Mover), Lee Beom-chan (Referee), Guk Joong-woong (Referee), Kim Nak-kyun (Detective), Lee Jae-woo (Photo studio owner), Lee Dong-kyu (UBS Network Sports anchor)

Choi Tae-joon (Jung Ho-jin), Lee Seon-gu (National fencing team coach), Lee Dong-kyu (UBS Network Sports anchor), Jung Hyung-suk (Kim Hak-gyu), Seok-hee (Sawaguchi), Kim Ji-ho (MBS TV network employee), Song Yo-sep (MBS TV network department head), Jeong Jong-hoon (KBY TV network department head), Han Gyu-hyuk (Kang Hak-rae), Garrison Farquharson-Keener (Alan Smith), Park Yoon (Jung Da-yeong), Cho Min-wook (Kwon Dung-uk)

Baek Suk-kwang (Na Sung-jin), Lee Joong-ok (Fencing club coach), Ok Ye-rin (Na Hee-do (young)), Kim Ha-ru (National team fencer), Lee Seon-gu (National fencing team coach), Lee Dong-kyu (UBS Network Sports anchor), Jung Hyung-suk (Kim Hak-gyu), Han Gyu-hyuk (Kang Hak-rae), Garrison Farquharson-Keener (Alan Smith), Park Yoon (Jung Da-yeong), Cho Min-wook (Kwon Dung-uk), Lee Jong-gu (Diner)

Ok Joo-ri (Ahyeon Supermarket owner), Bae Seong-il (Mr. Baek's ex-employee), Jeon Yeong (Yogurt lady), Lee Jun-hee (Ha Byung-jin), Park Eun-young (Neighbourhood woman), Yun Bu-jin (Neighbourhood woman), Goo Si-yeon (Jae-kyung's co-worker), Kwak Myung-hwa (Fencing association executive), Kim Seong-yong (Disciplinary committee member), Nam Dong-ha (Disciplinary committee member), Kim Joon-hyung (Sanga University coach)

Park Jung-pyo (Yi-jin's maternal uncle), Jung Hyung-suk (Kim Hak-gyu), Park Yoon (Jung Da-yeong), Cho Min-wook (Kwon Dung-uk), Yoo Min-joo (Park Hye-jin), Yoon Ju-man (PD Park), Lee Si-hoo (UBS Network cameraman), Park Ji-ho (UBS Network documentary staff), Yoon Se-woong (Seo Yeong-seong), Oh Choong-geun (UBS Network staff), Kim Tae-moon (UBS Network cameraman)

Kim Bum-joon (Ji-woong's friend), Park Jung-pyo (Yi-jin's maternal uncle), Jung Hyung-suk (Kim Hak-gyu), Park Yoon (Jung Da-yeong), Cho Min-wook (Kwon Dung-uk), Yoon Ju-man (PD Park), Lee Si-hoo (UBS Network cameraman), Park Ji-ho (UBS Network documentary staff), Yoon Se-woong (Seo Yeong-seong)

Baek Suk-kwang (Na Sung-jin), Ok Joo-ri (Ahyeon Supermarket owner), Ok Ye-rin (Na Hee-do (young)), Kyung Da-eun (Ko Yu-rim (young)), Lee Kyung-oh (UBS Network director), Park Jung-pyo (Yi-jin's maternal uncle), Jung Hyung-suk (Kim Hak-gyu), Park Yoon (Jung Da-yeong), Cho Min-wook (Kwon Dung-uk), Shin Yeon-sook (Hee-do's grandmother), Kim Joon-hyung (Sanga University coach), Yoon Se-woong (Seo Yeong-seong)

Choi Tae-joon (Jung Ho-jin), Kim Bum-joon (Ji-woong's friend), Jo Nam-hee (Taeyang High School headmaster), Jung Hyung-suk (Kim Hak-gyu), Yoon Se-woong (Seo Yeong-seong), Oh Choong-geun (UBS Network staff), Kim Tae-moon (UBS Network cameraman), Jeong Young-do (UBS anchorman), Shin Hee-cheol (Detective Kim), Jeong Hyeon-cheol (Detective), Do Ye-chan (Policeman), Park Chan-young (Upset diner)

Ok Joo-ri (Ahyeon Supermarket owner), Jung Hyung-suk (Kim Hak-gyu), Ji Hyun-woo (Jungle Prince bassist), Kang Sung-hwa (Jungle Prince guitarist), Im Woo-chan (Jungle Prince drummer), Kang Seong-jin (Jungle Prince keyboardist), Baek Ji-hye (Kim Da-mi), Lee Sang-kyung (Yang Chan-mi (young)), Kim Mi-hye (Shin Jae-kyung (young)), Kim Jun-ho (Jun-ho), Byun Yun-jeong (Ji-woong's mother)

Ri Min (Chinese restaurant owner), Yang Eun-sol (Reporter), Kim Jang-hwan (Reporter), So Jun-seong (Reporter), Na Ho-won (Bus driver), Choe Min (Fencing coach), Cha Mi-kyung (Victim's mother), Son Dong-soo (Sports agency employee), Choi Nam-wook (Fencing association employee)

Kim Si-kook (University teaching assistant), Kim Joo-ah (Sophia Choi), Park Yong (9/11 survivor), Lee Sung-il (UBS Network staff), Ha Seung-yeon (Hospital hallway woman), Park Ki-deok (Lee Gi-hun), Kwon Dan-a (National team fencer)

Kang Hoon (Baek Yi-hyun (adult)), Jung Chung-gu (Myeongjin Book Rentals owner), Park Ki-deok (Lee Gi-hun), Kwon Dan-a (National team fencer), Park Se-in (Han Min-jung), Kang Moon-kyung (UBS director 2009), Park Bin (UBS Network staff), Park Bo-bae (UBS Network staff), Kim Nam-hee (Cellphone store employee), Kim Do-gyeong (Staff)