| Name | Character | Episodes |
|---|---|---|
| David Lee McInnis | Ray | 40 |
| Lee Byung-hun | Kim Hyeon-Jun | 20 |
| Kim So-hyun | Ji Soo-Yun [Young] | 20 |
| Jang Hyuk | Jung Yoo-gun | 20 |
| Lee Joon | Yoon Shi-hyuk | 20 |
| Jung Jun-ho | Jin Sa-Woo | 20 |
| Jang Hyuk | Jung Yoo-Gun | 0 |
| Sung Dong-il | Park Joon-han | 0 |
| Lee Beom-soo | Yoo Joong-Won | 0 |
| Kang Shin-hyo | Jang Chul | 0 |