S1.E1 ∙ Balhae Lunar Research Station Thu, Dec 23, 2021 Director Choi's briefing about the mission leaves Song Jian displeased. Reaching the research station alone proves no easy feat for the crew. 6.7 /10
S1.E2 ∙ Three Storages Thu, Dec 23, 2021 The crew's initial findings are at odds with their knowledge of the research station. Split into threes, the members set out to look for the sample. 7 /10
S1.E3 ∙ Cause of Death Thu, Dec 23, 2021 Jian's body camera captures a startling moment of life and death. Submerged in sweat, Gong Soochan shows worrisome signs of an unusual infection. 7.1 /10
S1.E4 ∙ The Truth Comes Out Thu, Dec 23, 2021 Han Yunjae updates the director and gets access to a restricted area. The crew learns of the sample's powers and the true motive behind their mission. 7.2 /10
S1.E5 ∙ Secret Storage Thu, Dec 23, 2021 Recalling her sister's encrypted message, Jian searches the database for Luna. A young intruder and double-crosser emerge from the shadows. 7.2 /10
S1.E6 ∙ Key to Salvation Thu, Dec 23, 2021 E2, Ryu Taesuk and the samples go missing. Seeing a familiar name on the intruder, Jian follows her down the vents for answers. 7.1 /10
S1.E7 ∙ Luna Thu, Dec 23, 2021 Jian opens a hard drive that chronicles Song Wonkyong's life and work on the station. Meanwhile, others uncover the remains of the experiment. 7.2 /10
S1.E8 ∙ The Silent Sea Thu, Dec 23, 2021 Racing against time as the research station falls under destruction, the surviving crew members decide the fate of the mission - and their own. 6.8 /10
