| Episode credited cast: |
 | Joon-Gi Lee | - | Lee Soo-hyun / Kay (as Jun-ki Lee) |
 | Sang-mi Nam | - | Seo Ji-woo / Ari |
 | Kyung-ho Jung | - | Kang Min-ki (as Kyung Ho Jung) |
 | Jae-Sung Choi | - | Mao Liwart |
 | Kyung Soon Jung | - | Oh Seung-joo (NIS Supervisor) |
 | Kap-su Kim | - | Jung Hak-soo (Director / Chief Jung) |
| Ji-ho Choi | - | Ji Ra-peu, Giraffe |
| Sung Mo Jung | - | Seo Young-kil |
| Hyo-jun Park | - | Ah-hwa |
| Su-yeon Cha | - | Chao Ming |
| Rest of cast listed alphabetically: |
| Tae-Sung Lee | - | Bae Sang-shik |
| Jae-won Moon | - | NIS agent |
| Hye-won Park | - | Go Myeong Jae |
| Hyuk-kwon Park | - | Team leader |
 | Dong-won Seo | - | Choi Il Do |
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