Park Kwang-ho (16 episodes, 2017)
Hwayang Police Station Detective (1986) (16 episodes, 2017)
Kim Seon-jae (15 episodes, 2017)
Jeon Sung-Sik (15 episodes, 2017)
Mok Jin-woo (14 episodes, 2017)
Song Min-ha (14 episodes, 2017)
Shin Jae-yi (13 episodes, 2017)
Shin Yeon-sook (10 episodes, 2017)
Hong Hye-won / Hong Hye Won (4 episodes, 2017)
Park Kwang-ho / Park Gwang-ho (4 episodes, 2017)
Jung Ho-young (3 episodes, 2017)
Park Yeon-ho (3 episodes, 2017)
Mok Jin-woo (young) (3 episodes, 2017)
Kwak Tae-hee (2 episodes, 2017)
Reporter Oh / Oh Ji-hoon (2 episodes, 2017)
Yoo Ok-hee (2 episodes, 2017)
Jang Hyun-kyu (2 episodes, 2017)
Mok Jin-woo's childhood neighbour (2 episodes, 2017)
Kim Young-ja (1 episode, 2017)
LT Jim Headley (1 episode, 2017)
Kim 'Tiffany' Ji-hye (1 episode, 2017)
Mother of Park Kwang-ho born in 1988 (1 episode, 2017)
Sun-jae's partner (1 episode, 2017)
Mok Jin-woo (child) (1 episode, 2017)
Lee Jung-sook's mother (1 episode, 2017)
Mrs. Kim (University Assistant) (1 episode, 2017)
Shin Yeon-sook former Landlady (1 episode, 2017)
Kim Wan (1 episode, 2017)
Jin Sung-chul (1 episode, 2017)
Kim Kuyng-soon's brother (1 episode, 2017)
Yoon Da-young's friend (1 episode, 2017)
Park Dong-Joon (1 episode, 2017)
Jung Jae-hyung (1 episode, 2017)
Sun Hwa (1 episode, 2017)
Kim Seon-jae (child) (1 episode, 2017)