Go Yoon

as Victor (1 episode)

as Yong Min (10 episodes)

as Gong Jin-dan (50 episodes)

as Jong-chil

as Choi Jin-took (12 episodes)

as Agent Park (16 episodes)

as Jung Hyeon-gi (16 episodes)

as Jung Ji-hoon (1 episode)

as Hae-jin

as Noh Jin Woo (6 episodes)

as Hyun Bin [Kyung Ha's boss] (100 episodes)

as Loe/Noh Jin Woo (11 episodes)

as Lee Han (20 episodes)

as Oh Dae-su

as Jung Hyun Ho (16 episodes)

as Jae-joong

as Hyeon Bong-hak

as Japanese fighter