The Silent Sea

• 
  E1

  Balhae Lunar Research Station

  Director Choi's briefing about the mission leaves Song Ji-an displeased. Reaching the research station alone proves no easy feat for the crew.

  2021-12-24 · 51m
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• 
  E2

  Three Storages

  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.

  2021-12-24 · 47m
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• 
  E3

  Cause of Death

  Ji-an's body cam captures a startling moment of life and death. Submerged in sweat, Gong Soo-chan shows worrisome signs of an unusual infection.

  2021-12-24 · 48m
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• 
  E4

  The Truth Comes Out

  Han Yun-jae 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.

  2021-12-24 · 45m
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• 
  E5

  Secret Storage

  Recalling her sister's encrypted message, Ji-an searches the database for Luna. A young intruder and a double-crosser emerge from the shadows.

  2021-12-24 · 40m
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• 
  E6

  Key to Salvation

  E2, Ryu Tae-suk and the samples go missing. Seeing a familiar name on the intruder, Ji-an follows her down the vents for answers.

  2021-12-24 · 44m
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• 
  E7

  Luna

  Ji-an opens a hard drive that chronicles Song Won-kyung's life and work on the station. Meanwhile, others uncover the remains of the experiment.

  2021-12-24 · 40m
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• 
  E8

  The Silent Sea

  Racing against time as the research station falls under destruction, the surviving crew members decide on the fate of the mission — and their own.

  2021-12-24 · 48m
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Top cast

Bae Doona

Song Ji-an

Gong Yoo

Han Yun-jae

Lee Joon

Ryu Tae-suk

Kim Sun-young

Hong Ga-young

Lee Mu-saeng

Gong Soo-hyuk

Lee Sung-wook

Kim Hee-sun

Jung Soon-won

Gong Soo-chan

Choi Young-woo

Lee Ki-soo

Cha Rae-hyung

E1

Yoo Hee-je

E2

You Seong-joo

Mr. Hwang

Kang Mal-geum

Song Won-kyung