Cast
Main
1. Bae Doona as Doctor Song Ji-an➡41
2. Gong Yoo as Han Yoon-jae➡41
3. Lee Joon as Lieutenant Ryoo Tae-seok➡31
Supporting
Members of the mission
4. Kim Sun-young as Dr. Hong Ga-Young➡44
5. Kim Si-A as Luna 073
6. Lee Moo-saeng as Chief Gong Soo-hyuk
7. Lee Sung-Wook as Kim Sun
8. Choi Yong-Woo as Lee Gi-su
9. Jung Soon-Won as Gong Soo-chan
10. Yoo Hee-je as E2
11. Cha Rae-Hyoung as E1
12. Yu Seong-Ju as Mr. Hwang
13. Yoon Hae-ri as Eun Ji-Young
14. Kang Mal-geum as Song Won-kyung➡42
15. Heo Sung-tae as Kim Jae-sun➡43
16. Gil Hae-yeon as Director Choi➡56
17. Ahn Dong-goo as Employee➡27
