Original Sin Season 1 Episode release dates & where to watch

1. Episode 1

When a headless body surfaces from a lake, Zheng Ming and Dai Yu uncover a nervous witness who may be hiding the truth.

2. Episode 2

As Zheng Ming zeroes in on Hao Yuanfang, buried ties to Huang Xiaojie complicate the investigation.

3. Episode 3

Dai Yu digs into Jin Ji’s troubled past while a key witness vanishes, pushing Zheng Ming closer to a breakthrough.

4. Episode 4

A second body surfaces and a suspect escapes, forcing Zheng Ming and Dai Yu to escalate the hunt.

5. Episode 5

Dai Yu’s forensic reconstruction corners a suspect—but Zheng Ming still can’t locate the missing victim.

6. Episode 6

A stolen corpse and missing college students pull Dai Yu and Zheng Ming into overlapping nightmares.

7. Episode 7

After a late-night sighting, Dai Yu uncovers a chilling clue at a cliffside crime scene.

8. Episode 8

Zheng Ming keeps a crucial discovery secret as suspicion shifts toward someone close to the victim.

9. Episode 9

A tampered DNA report leads Dai Yu to question everything—including the victim’s family ties.

10. Episode 10

As betrayal unravels, Zheng Ming races to secure the one piece of evidence that could close the case.

11. Episode 11

Haunted by Xu Haishan’s past, Zheng Ming clashes with Dai Yu when an old case resurfaces.

12. Episode 12

A suspicious confession divides Dai Yu and Zheng Ming, deepening fractures within the team.

13. Episode 13

While dismantling an organ trafficking ring, Zheng Ming’s trauma resurfaces at the worst possible moment.

14. Episode 14

Dai Yu uncovers a fatal transplant secret, exposing a deadly conspiracy behind multiple murders.

15. Episode 15

A casino raid spirals out of control, and Dai Yu’s life hangs in the balance.

16. Episode 16

After Lin Zhixiao’s death, Dai Yu reveals Xu Haishan’s truth to Zheng Ming—reopening old wounds.

17. Episode 17

Zheng Ming’s secret investigation uncovers a disturbing video that points to Ye Xing.

18. Episode 18

Ye Xing offers a risky deal as Dai Yu and Zheng Ming investigate a decades-old trafficking case.

19. Episode 19

A hidden recording forces Ye Xing and Yang Yongchang into a dangerous confrontation.

20. Episode 20

Dai Yu reconstructs the night of the crime, dismantling Yang Yongchang’s airtight alibi.

21. Episode 21

When a blind woman is murdered, Zheng Ming and Dai Yu confront a killer who leaves numbered clues behind.

22. Episode 22

As Pang Beiyuan is arrested, Dai Yu suspects the truth behind the arson case is far from simple.

23. Episode 23

A mysterious toxin and a shocking link to Dai Yu’s father push the investigation closer to home.

24. Episode 24

After stealing Dai Yu’s father’s ashes, Pang Beiyuan demands a private meeting.

25. Episode 25 Finale

In a final standoff, Dai Yu confronts Pang Beiyuan as Zheng Ming is forced to make an impossible choice.