Han Tae Sul (16 episodes, 2021)
Kang Seo Hae (16 episodes, 2021)
Additional voices (16 episodes, 2021)
Flight Attendant / various (16 episodes, 2021)
Member of Control Bureau (16 episodes, 2021)
Edward 'Eddy' Kim (15 episodes, 2021)
Kim Seo Jin (14 episodes, 2021)
President Park (14 episodes, 2021)
Kang Dong Ki (14 episodes, 2021)
Choi Jae Sun (12 episodes, 2021)
Hwang Hyun Seung (12 episodes, 2021)
Uhm Seon Ho (12 episodes, 2021)
Bing Bing (11 episodes, 2021)
Sigma (11 episodes, 2021)
Uhm Seon Jae (11 episodes, 2021)
Han Tae San (10 episodes, 2021)
Jung Hyeon Gi (10 episodes, 2021)
Kwon Hyuk Bum (10 episodes, 2021)
(9 episodes, 2021)
Ma Yong Suk (8 episodes, 2021)
Young Seo-Hae (7 episodes, 2021)
Lee Eun Hee (7 episodes, 2021)
Kang Seo Hae (young) (7 episodes, 2021)
Choi Yeon Shik (7 episodes, 2021)
Kim Han Yong (6 episodes, 2021)
Yeo Bong Seon (6 episodes, 2021)
Han Tae Sul (young) (5 episodes, 2021)
Sigma Officer (4 episodes, 2021)
Choi Go Eun (3 episodes, 2021)
Kim Han Yong's wife (3 episodes, 2021)
Kim Dong Hyeon (2 episodes, 2021)
Han Tae San (young) (2 episodes, 2021)
Seo Won Ju (2 episodes, 2021)
Chinese restaurant owner (2 episodes, 2021)
Choi Jae Sun's mother (2 episodes, 2021)
Bully (1 episode, 2021)
Copilot (1 episode, 2021)
Yu-Rim (1 episode, 2021)
Jung Hyeon Gi's mother (1 episode, 2021)
Sun's landlord (1 episode, 2021)
Co-pilot (1 episode, 2021)
Flight attendant (1 episode, 2021)
Jin Hee (1 episode, 2021)
Kim Jin Hui (1 episode, 2021)
Seo Won Ju / Young Sigma (1 episode, 2021)