- Hyun Bin
- Â Ri Jeong-hyeok 17 episodes, 2019-2020
- Son Ye-jin
- Â Yoon Se-ri 17 episodes, 2019-2020
- Seo Ji-hye
- Â Seo Dan 17 episodes, 2019-2020
- Kim Jung-hyun
- Â Goo Seung-joon 17 episodes, 2019-2020
- Yang Kyung-won
- Â Pyo Chi-soo 16 episodes, 2019-2020
- Yoo Su-bin
- Â Kim Joo-meok 16 episodes, 2019-2020
- Lee Sin-young
- Â Park Kwang-beom 16 episodes, 2019-2020
- Tang Joon-sang
- Â Geum Eun-dong 16 episodes, 2019-2020
- Kim Sun-young
- Â Na Wol-sook 16 episodes, 2019-2020
- Kim Jung-nan
- Â Ma Yeong-ae 16 episodes, 2019-2020
- Jang So-yeon
- Â Hyeon Myeong-soon 16 episodes, 2019-2020
- Cha Cheong-hwa
- Â Yang Ok-geum 15 episodes, 2019-2020
- Park Hyoung-soo
- Â Yoon Se-hyeong 15 episodes, 2019-2020
- Oh Man-seok
- Â Jo Cheol-gang 15 episodes, 2019-2020
- Go Gyu-pil
- Â Hong Chang-sik 15 episodes, 2019-2020
- Park Myeong-hoon
- Â Go Myeong-suk 14 episodes, 2019-2020
- Kim Young-min
- Â Jeong Man-bok 14 episodes, 2019-2020
- Hwang Woo-seul-hye
- Â Do Hye-ji 14 episodes, 2019-2020
- Yun Ji-min
- Â Go Sang-ah 14 episodes, 2019-2020
- Hong Woo-jin
- Â Cheon Su-bok 13 episodes, 2019-2020
- Jang Hye-jin
- Â Go Myeong-eun 13 episodes, 2019-2020
- Pang Eun-jin
- Â Han Jeong-yeon 13 episodes, 2019-2020
- Choi Dae-hoon
- Â Yoon Se-jun 12 episodes, 2019-2020
- Nam Kyung-eup
- Â Yoon Jeung-pyeong 12 episodes, 2019-2020
- Im Chul-soo
- Â Park Soo-chan 11 episodes, 2019-2020
- Jeon Gook-hwan
- Â Ri Choong-ryeol 10 episodes, 2019-2020
- Kim Ah-ra
- Â Company House Villager 10 episodes, 2019-2020
- Oh Han-kyul
- Â Jeong Woo-pil 10 episodes, 2019-2020
- Kwon Dong-ho
- Â Purchasing Manager 10 episodes, 2019-2020
- Lim Sung-mi
- Â Geum-soon 9 episodes, 2019-2020
- Yoon Sang-hoon
- Â Manager Oh 9 episodes, 2019-2020
- Goo Joon-woo
- Â Ma Nam-sik 9 episodes, 2019-2020
- Woon Jung-won
- Â Company House Villager 8 episodes, 2019-2020
- Park Seung-joon
- Â Na Ho-yeong 8 episodes, 2019-2020
- Kang Young-eun
- Â Park Eun-byeol 7 episodes, 2019-2020
- Jung Ae-ri
- Â Kim Yoon-hee 6 episodes, 2019-2020
- Kang Hyoung-suk
- Â Jo Cheol-gang's Subordinate 6 episodes, 2019-2020
- Kim Young-pil
- Â Senior Colonel Se Dae-ju 6 episodes, 2019-2020
- Ha Seok-jin
- Â Ri Mu-hyeok 5 episodes, 2019-2020
- Jang Nam-boo
- Â Military Director 5 episodes, 2020
- Jeon Jin-woo
- Â Bureau Director Choi 4 episodes, 2019-2020
- Jung Kyung-ho
- Â Cha Sang-woo 3 episodes, 2019-2020
- Kim Tae-yeon
- Â Young Yoon Se-ri 3 episodes, 2019-2020
- Kim Seung-chan
- Â Young Ri Jeong-hyeok 3 episodes, 2019-2020
- Yoo Jung-ho
- Â NIS Section Chief Kim 3 episodes, 2020
- Bae Sung-il
- Â Ri Choong-ryeol's Subordinate 3 episodes, 2020
- Kim Bum-suk
- Â North Korea Track Team Coach 3 episodes, 2020
- Ahn Se-bin
- Â Beggar Boy's Sister 2 episodes, 2019-2020
- Cha Sung-je
- Â Beggar Boy 2 episodes, 2019-2020
- Kim Yoon-joo
- Â Jin-sook 2 episodes, 2019-2020
- Hwang In-joon
- Â Market Pawn Broker 2 episodes, 2019-2020
- Kwak Ja-hyoung
- Â Chief Coast Guard 2 episodes, 2019
- Baek Seung-chul
- Â Fishing Boat Captain 2 episodes, 2019
- Baek Sung-chul
- Â Hwang Yeong-beom 2 episodes, 2019
- Choi Ji-woo
- Â Choi Ji-woo 2 episodes, 2020
- Ko Han-min
- Â Doctor 2 episodes, 2020
- Choi Seung-yoon
- Â NIS Agent 2 episodes, 2020
- Lee Ho-jung
- Â Patient 2 episodes, 2020
- Han Dong-ho
- Â NIS Agent 2 episodes, 2020
- Kim Sook
- Â Fortune Teller 2 episodes, 2020
- Son Dong-hwa
- Â NIS Agent 2 episodes, 2020
- Choi Hong-il
- Â Jang So-cheol 2 episodes, 2020
- Song Ho-soo
- Â NIS Agent 2 episodes, 2020
- Lee Sang-hwa
- Â Park Soo-chan's Boss 2 episodes, 2020
- Lee Soo-yong
- Â Ryu Jeong-min 2 episodes, 2020
- Park Gi-ryoong
- Â NIS Executive 2 episodes, 2020
- Moon Ba-rom
- Â Kidnapper 2 episodes, 2020
- Kim Na-in
- Â Kidnapper 2 episodes, 2020
- Park Sung-woong
- Â Taxi Driver 1 episode, 2019
- Lee Dong-yong
- Â Grave Robber 1 episode, 2019
- Lim Chae-sun
- Â Grave Robber 1 episode, 2019
- Lee Kyu-hoi
- Â Goverment official 1 episode, 2019
- Lee Chun-moo
- Â Little boy 1 episode, 2019
- Park Kwang-il
- Â Armory Staff 1 episode, 2019
- Kim Jung-han
- Â North Korean soldier 1 episode, 2019
- Jin Yong-wook
- Â Meat Butcher 1 episode, 2019
- Choi Moo-in
- Â Hwang Tae-yong 1 episode, 2019
- Jang Young-hyeon
- Â Paragliding office employee 1 episode, 2019
- Park Yong
- Â Police Officer Lee Gun-woo 1 episode, 2019
- Lee Se-rang
- Â Elevator Girl 1 episode, 2019
- Anastasiia Sokolova
- Â Julia 1 episode, 2019
- Lee Young-jin
- Â Studio Photographer 1 episode, 2019
- Julian Kobler
- Â Schulkamerad 1 episode, 2019
- Sun Jeong-hwa
- Â Hairdresser 1 episode, 2019
- Kang Chan-yang
- Â Pyongpyang Hotel Receptionist 1 episode, 2019
- Jung Sang-hyun
- Â Bully Kid 1 episode, 2019
- Kim Soo-hyun
- Â Bang Dong-gu 1 episode, 2020
- Na Young-hee
- Â Wedding Dress Designer 1 episode, 2020
- Park Ok-chool
- Â Apartment Elevator Girl 1 episode, 2020
- Ahn Soo-bin
- Â Seo Dan's Friend 3 1 episode, 2020
- Park Seo-yeon
- Â Young Seo Dan 1 episode, 2020
- Klemens Niklaus Trenkle
- Â Concert Guest / ... 1 episode, 2020
- Sin Dong-ryeok
- Â English tutor 1 episode, 2020
- Oh Kyu-taek
- Â Real estate agent 1 episode, 2020
- Song Hoon
- Â Ministry of Unification official 1 episode, 2020
- Park Chan-woo
- Â North Korean Doctor 1 episode, 2020
- Jung Dong-geun
- Â Se Ri's Surgeon 1 episode, 2020
- Jeon Eun-mi
- Â Se-ri's caretaker 1 episode, 2020
- Nam Jung-woo
- Â Military Director's Subordinate 1 episode, 2020
- Bae Bo-ram
- Â Seo Dan's Friend 2 1 episode, 2020
- Lee Jung-yeol
- Â Military Trial Judge 1 episode, 2020
- Shin Mi-young
- Â Apartment Elevator Girl 1 episode, 2020
- Kim Young-joo
- Â Detective 1 episode, 2020
- Koo Ji-hye
- Â Seo Dan's High School Classmate 1 episode, 2020
- Yu Seung-il
- Â Detention Center Head 1 episode, 2020
- Moon Ju-won
- Â Ri Jeong-hyeok (child) (photo) 1 episode, 2020
- Kyung Ki-hyun
- Â Subway Sandwich Guy 1 episode, 2020
- Kim Yong-jin
- Â Market Passerby 1 episode, 2020
- Kang Ro-chae
- Â Yoon Mi Ji 1 episode, 2020
- Jung Young-hoon
- Â Seri's Choice Security 1 episode, 2020
- Oh Jae-se
- Â Commander at Guard Post 1 episode, 2020
- Severino Negri
- Â Waiter (uncredited) 1 episode, 2020
