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7.22025 · Ended1 seasons8 episodesHD · Subtitles

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About Queen Mantis

Cha Su-yeol, a police officer who has long despised his mother, the notorious 'Mantis' serial killer, must reluctantly turn to her for help when a copycat killer emerges.

Queen Mantis runs for 1 season, created by Byun Young-joo. Every episode page keeps the show's order, so you can watch from the pilot to the finale without hunting for the next link. Episodes are bought individually for 1 credit.

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Episodes

Season 1 · 8 episodes

Episode 1

When a series of terrible murders ensues in a residential area, Cha Su-yeol is forced to seek help from Jeong I-sin, a serial killer from the past.

2025-09-05 60m★ 6.5Now playing

Episode 2

The culprit has been arrested, but the victim’s whereabouts remain unknown. Su-yeol struggles to save a life as I-sin reveals her true intentions.

2025-09-06 61m★ 7.5

Episode 3

I-shin offers assistance with the investigation, but it's unclear why she would help a cop. Su-yeol unravels the origins of I-shin's murderous instinct.

2025-09-12 61m★ 7.0

Episode 4

The culprit begins to close in on Su-yeol's family. I-shin pressures Su-yeol to take action — but she happens to be the one threatening his family.

2025-09-13 60m★ 6.5

Episode 5

Su-yeol finds I-shin in his home after she vanishes under police watch. The killer demands to speak to I-shin and gives her a hint about the plan.

2025-09-19 60m★ 6.5

Episode 6

Shaken by recent events, Su-yeol attempts to confide in Lee Jung-yeon. During a tense call, I-shin manipulates the killer into exposing a crucial lead.

2025-09-20 60m★ 6.5

Episode 7

As Jung-yeon copes with the truth of Su-yeol's past, the killer reveals their identity — and takes a hostage, forcing Su-yeol into a dangerous bargain.

2025-09-26 60m★ 5.0

Episode 8

After a tense hostage exchange, I-shin confronts her protégé. Su-yeol makes a grim discovery about his family's fractured past.

2025-09-27 60m★ 3.0

Season 1

Queen Mantis FAQ

How much does it cost to watch Queen Mantis?

Episodes cost 1 credit each. Credits are $1 each, so a full season costs the number of episodes in credits. Each episode you unlock stays in your account permanently.

Do I need an account to watch Queen Mantis?

Yes. Create an account and add credits before unlocking an episode. Signing up is free and only needs an email and password.

How many seasons of Queen Mantis are there?

Queen Mantis has 1 season on Cineby, with 8 episodes in total. Start with season 1 below.

Where should I start watching Queen Mantis?

Start with season 1, episode 1. The episode list on this page keeps the order, and the player moves to the next episode when one ends.

Can I watch Queen Mantis with subtitles on my phone?

Yes. The player includes a CC menu where available, and the whole site is built for mobile. Fullscreen and picture-in-picture are supported.