Season 1

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  6.3/101,859 votes

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  Najin

  Season 1 Episode 1 - Aired 12/22/2023

  Facing financial ruin, Jang Tae-sang agrees to track down a missing person — but two figures trail him. Meanwhile, sinister operations occur underground.

  Director: N/A

  Writer: N/A

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  6.7/101,913 votes

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  Mother

  Season 1 Episode 2 - Aired 12/22/2023

  Yoon Chae-ok and Yoon Jung-won find a lead on Myeong-ja, leading them to a hospital. Soon, a calamity traps the two inside, leaving Tae-sang concerned.

  Director: N/A

  Writer: N/A

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  6.6/101,623 votes

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  Signal

  Season 1 Episode 3 - Aired 12/22/2023

  Tae-sang decides to reenter the hospital, but discovers that Ryu Sachimoto is nearby. At the hospital, Chae-ok and Jung-won devise a risky rescue plan.

  Director: N/A

  Writer: N/A

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  6.6/101,580 votes

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  Imprinting

  Season 1 Episode 4 - Aired 12/22/2023

  Reunited in their search for Myeong-ja, Tae-sang and Chae-ok attempt to also save other survivors. But soon, the monster makes itself known.

  Director: N/A

  Writer: N/A

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  6.5/101,500 votes

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  Desperation

  Season 1 Episode 5 - Aired 12/22/2023

  After coming face to face with the creature, Tae-sang and Chae-ok get captured. But as one plans his escape, the other stays to find a person dear to her.

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  6.7/101,535 votes

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  Chaos

  Season 1 Episode 6 - Aired 12/22/2023

  Tae-sang steadfastly remains to save Chae-ok and the captives. On a mission to find her mother, Chae-ok learns the grisly truth — and confronts the beast.

  Director: N/A

  Writer: N/A

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  6.6/101,838 votes

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  Chase

  Season 1 Episode 7 - Aired 12/22/2023

  With only 10 minutes to act, Tae-sang and Chae-ok risk it all to get everyone to safety. But just as all goes to plan, one of them may not get out alive.

  Director: N/A

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  6.7/10791 votes

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  Awakening

  Season 1 Episode 8 - Aired 1/5/2024

  An unlikely acquaintance becomes Tae-sang's ticket out of the hospital. After a touching reunion, Tae-sang and Chae-ok encounter a transformed Myeong-ja.

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  Writer: N/A

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  6.7/10826 votes

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  Atrocity

  Season 1 Episode 9 - Aired 1/5/2024

  After a series of grisly deaths, Ishikawa finds Myeong-ja in her new state. Tae-sang shares a tender moment with Chae-ok, unaware of her hidden plan.

  Director: N/A

  Writer: N/A

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  6.4/10938 votes

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  Tear

  Season 1 Episode 10 - Aired 1/5/2024

  In order to rescue Chae-ok and stop the atrocity, Tae-sang and Jung-won forge a plan. But just as the coast seems clear, Yukiko Maeda stands in the way.

  Director: N/A

  Writer: N/A