- Kim Nam-gil
- Â Kim Hae Il 41 episodes, 2019-2024
- Kim Sung Kyun
- Â Goo Dae Young 41 episodes, 2019-2024
- Lee Hanee
- Â Park Kyung Sun 41 episodes, 2019-2024
- Jeon Sung-woo
- Â Han Sung Kyu 40 episodes, 2019
- Jang Won-hyung
- Â Kim Hyeok-seong 40 episodes, 2019
- Go Joon
- Â Hwang Cheol-bum 39 episodes, 2019
- Kim Hyung-mook
- Â Chief Prosecutor Kang 39 episodes, 2019
- Baek Ji-won
- Â Sister Kim In Kyung 39 episodes, 2019
- Keum Sae-rok
- Â Seo Seung-ah 38 episodes, 2019
- Ahn Chang-hwan
- Â Ssongsak Tekaratanapeuraseoteu 37 episodes, 2019
- Eum Moon-suk
- Â Jang Ryong 37 episodes, 2019
- Jeong In-gi
- Â Chief Superintendent Nam 34 episodes, 2019
- Jung Young-joo
- Â Jung Dong Ja 33 episodes, 2019
- Go Gyu-pil
- Â Oh Yo Han [Part-timer] 32 episodes, 2019
- Kim Won-hae
- Â Vladimir Gojayev 27 episodes, 2019
- Kim Min-jae
- Â Lee Joong Kwon [Korean NIS agent] 26 episodes, 2019
- Lee Mun-shik
- Â Ki Yong Moon [Leader of Daegakgyo] 21 episodes, 2019
- Jung Dong-hwan
- Â Father Lee Young Joon 17 episodes, 2019
- Sung Jun
- Â Kim Hong-Sik / ... 12 episodes, 2024
- Yang Hyun-min
- Â Captain Park 12 episodes, 2024
- Shin Dam-Soo
- Â Detective Lee 10 episodes, 2019
- Lee Je-Yeon
- Â Kim Hoon Suk 8 episodes, 2019
- Cha Cheong-hwa
- Â Ahn Dul Ja 4 episodes, 2019
- Yoon Joo-hee
- Â Bae Hee Jung [Psychiatrist] 4 episodes, 2019
- Anastasiia Sokolova
- Â Anna 4 episodes, 2019
- Tae-Gyeom Kim
- Â Prosecutor Nam 2 episodes, 2019
- Lee Ki-young
- Â NIS Chief Oh 1 episode, 2019
- Jeong Si-a
- Â Maegakkyo believer 1 episode, 2019
- Jung Dong-geun
- Â Hanjoo Group lawyer 1 episode, 2019
- Jeon Eun-mi
- Â Wangmat Foods staff 1 episode, 2019
- Shin Hyun-jong
- Â Kyung Sun's father's friend 1 episode, 2019
- Bae Gi-beom
- Â Priest 1 episode, 2019
- Lee Yeong-beom
- Â Father Kang Matthew 1 episode, 2019
- Jung Yeong-Do
- Â News reporter 1 episode, 2019
- Kwon Hyuk-soo
- Â President of South Korea 1 episode, 2019
- Jung Yee-yeon
- Â Prosecutor Kim 1 episode, 2019
- Han Dong-kyu
- Â Shaman Cheol Yong 1 episode, 2019
- Bibi
- Â Gu Ja Young 1 episode, 2024
- Seo Hyun-woo
- Â Nam Doo Heon 1 episode, 2024
- Han Jonghoon
- Â Interpol Captain 1 episode, 2024
