When mysterious alien spheres start invading the world, high school students are called upon to join the world's first war against extraterrestrial forces.
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Kim Ki-hae
Kim Chi-yeol
Shin Myung-sung
Im Woo-taek
Shin Hyun-soo
Lee Chun-ho
Im Se-mi
Park Eun-young
Ahn Do-gyu
Guk Young-su
Kim Min-chul
Doh Su-chul
Kim Su-gyeom
Kwon Il-ha
Ro Jong-hyun
Jang Young-hoon
Woo Min-kyu
Kim Duk-joong
Yeo Joo-ha
Kim You-jung
All 10 episodes plotted by IMDb rating
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10 episodes • 2023Avg: 8.2Golden Era
| # | Episode | Air Date | Rating |
|---|---|---|---|
| 1 | Question the Spheres | Mar 31, 2023 | 8.3 |
| 2 | Military Training Begins | Mar 31, 2023 | 8.3 |
| 3 | School Escape | Mar 31, 2023 | 9.0 |
| 4 | Become the Villain | Mar 31, 2023 | 8.3 |
| 5 | Will We Ever Go Home? | Mar 31, 2023 | 8.0 |
| 6 | Fight or Flight | Mar 31, 2023 | 8.0 |
| 7 | Disagreement Among Classmates | Apr 21, 2023 | 8.0 |
| 8 | Prisoners at Yongwon Penitentiary | Apr 21, 2023 | 8.0 |
| 9 | For Whom the Bell Tolls | Apr 21, 2023 | 8.0 |
| 10 | End of the War | Apr 21, 2023 | 8.0 |
