- Yoo In-na
- Â Kang Ah Reum 32 episodes, 2020
- Eric Moon
- Â Jeon Ji Hoon 32 episodes, 2020
- Moon Ji-hoo
- Â Doo Bong's underling 32 episodes, 2020
- Lim Ju-hwan
- Â Derek Hyun 31 episodes, 2020
- Cha Joo-young
- Â Hwang Seo Ra 30 episodes, 2020
- Bae In-hyuk
- Â Kim Young Gu 29 episodes, 2020
- Kim Tae-woo
- Â Ban Jin Min 27 episodes, 2020
- Jung Suk-yong
- Â Kang Tae Ryong 25 episodes, 2020
- Park So-jin
- Â Bae Du Rae 24 episodes, 2020
- Lee Jong-Won
- Â Tinker 19 episodes, 2020
- Hyun-Joon Ji
- Â Jang Doo Bong 17 episodes, 2020
- Lee Joo-woo
- Â Kim Dong Ran 14 episodes, 2020
- Jeon Seung-Bin
- Â Peter / ... 14 episodes, 2020
- Ian Kim
- Â Chen Lee 10 episodes, 2020
- Sohui Yoon
- Â Sophie Ahn 9 episodes, 2020
- Jang Jae-ho
- Â Kim Dong Taek 9 episodes, 2020
- Kim Hye-Ok
- Â Hye Ra Shin 7 episodes, 2020
- Kim Chung
- Â Kang Ah Reum's mother 7 episodes, 2020
- John D. Michaels
- Â CIA official 6 episodes, 2020
- Oh Kyung-Joo
- Â Park Sung Hwan 5 episodes, 2020
- Ahn Hee-yeon
- Â Sienna Park 2 episodes, 2020
- Daniel Joey Albright
- Â Max 1 episode, 2020
- Anastasia Kim
- Â Shao Lee 1 episode, 2020
- Jang Ga-Hyun
- Â Veronica Jang 1 episode, 2020
- Foster Burden
- Â Harrison Young 1 episode, 2020
- Yu Chae-Yeon
- Â Kang Ah Reum (young) 1 episode, 2020
- Garrison Michael Farquharson-Keener
- Â Craig Jones / ... unknown episodes
