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Episode One

S1 E1 / 42m 44s / TV-14
Physicist Yang Dong dies by suicide at home; Wang Miao is invited by Shi Qiang to attend a secret meeting. General Chang Weisi, who chairs the meeting, believes Yang Dong's death and the frequent physicist suicides are related to an organization called Frontiers of Science. Wang Miao recalls Shen Yufei inviting him to join this organization, and Chang Weisi hopes to investigate the organization.
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Episode Two

S1 E2 / 43m 14s / TV-14
Wang Miao meets Ding Yi, who explains the meaning of "physics does not exist" from Yang Dong's suicide note. Wang attends a Frontiers of Science event, learning of two frightening hypotheses, "Shooter" and "Farmer." Shi Qiang informs him of Yang Dong's funeral in two days. At the funeral, Wang tries to give a photo of Yang Dong to her mother, Ye Wenjie, but notices a white line.
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Episode Three

S1 E3 / 42m 7s / TV-14
Wang Miao repeatedly takes photos, trying to find the underlying principle, and discovers a countdown of numbers, horrifying him. Wang grabs his camera to find a repair shop, followed by Shi Qiang, who is monitoring him. On the way, Wang sees flashing countdown numbers before his eyes.The next day, he visits the hospital for his eyes; the doctor says it's just floaters, which leaves him upset.
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Episode Four

S1 E4 / 46m 35s / TV-14
Shen Yufei receives Wang Miao's call and tells him to stop his nanomaterial research. Facing difficulties in Nano Flying Blade research, Wang halts the experiment, and the countdown vanishes. He calls Shen Yufei but hears a chilling statement: "The universe will flicker for you in three days." Wang seeks help from Ye Wenjie, who introduces her student, Sha Ruishan.
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Episode Five

S1 E5 / 50m 7s / TV-14
Shi Qiang tells Wang Miao that Yang Dong had also contacted Shen Yufei before her death by suicide. Wang visits the radio astronomy observatory, and at 1 a.m., the universe indeed flickers! Sha Ruishan prints the data, revealing a countdown. Wang calls Shen Yufei, asking about the countdown's end; she doesn't know. Shi Qiang finds Wang, who shares his discoveries. Shi believes it's a conspiracy.
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Episode Six

S1 E6 / 41m 29s / TV-14
Wang Miao accepts a covert mission in the Frontiers of Science. Meanwhile, Shi Qiang learns about Ye Wenjie's unique experiences from assistant Xu Bingbing's investigation. Ye Wenjie's father, Ye Zhetai, suffers a mental breakdown after a fallout with his second daughter, Ye Wenxue, and wife Shao Lin, eventually dying in despair. Ye Wenjie remains calm, which Shi Qiang cannot comprehend.
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Episode Seven

S1 E7 / 41m 50s / TV-14
Shen Yufei argues with biologist Pan Han. Shen stands her ground and gives Wang a website address. Shi Qiang and Wang access the site, entering the Three-Body game. Wang learns they're in the "Chaotic Era," with unpredictable solar movements, making survival difficult. In the game, people can dehydrate and revive during the "Stable Era." Wang suspects the goal is to ensure civilization's survival.
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Episode Eight

S1 E8 / 47m 47s / TV-14
After several brief Stable Eras, three flying stars appear, and extreme cold destroys everything. Wang witnesses the destruction of Civilization 137 in the game. Elsewhere, Chang Weisi suggests monitoring top scientists for signs of infiltration by the Frontiers of Science and initiating protection.Protected scientists face accidents, and reporter Mu Xing captures their relocation to safe houses.
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Episode Nine

S1 E9 / 42m 16s / TV-14
Pan Han, who secretly manipulates everything, argues fiercely with Shen Yufei. Pan believes Wang's continued nanomaterial research signifies Shen's failure, but Shen thinks the Lord prefers Wang to join them. While seemingly brainwashed by Pan, Mu Xing secretly collects Pan's recordings.Shi Qiang and Wang hope for a breakthrough from Shen.
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Episode Ten

S1 E10 / 44m 55s / TV-14
Xu Bingbing tries to find out what happened to Yang Dong before her death. Yang Dong’s suicide seems out of context. Shi Qiang suggests Wang Miao to talk to Ye Wenjie. Wang Miao talks with Ye Wenjie about her early experiences at Great Khingan. Young Ye Wenjie met Bai Mulin while working in the countryside. Bai Mulin wanted to write a letter to report unethical behaviors to the central government.
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Episode Eleven

S1 E11 / 33m 18s / TV-14
Ye Wenjie was under investigation for the letter she transcribed. Bai Mulin blamed Ye Wenjie for writing the original letter.Even though Ye Wenjie was disappointed, she still refused to confess in exchange for a lighter punishment. Wang Miao is shocked by Ye Wenjie’s story. Ye Wenjie says that all right and wrong are viewed through different perspectives.
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Episode Twelve

S1 E12 / 42m 58s / TV-14
Shi Qiang becomes more suspicious about Ye Wenjie as everything seems to be connected to her. The priority is to proceed with the Three-Body game with Wang Miao. Wang Miao re-enters the game and realizes that many things are different from the last time. Wang Miao meets Mozi, the creator of a cosmic model and constantly reminds Mozi about the flying stars. A huge sun confirms Wang Miao's ideas.
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Episode Thirteen

S1 E13 / 44m 30s / TV-14
Wang Miao is confused about the flying stars, and Shi Qiang suggests him to consult with Ye Wenjie. Mu Xing senses that Pan Han is supported by a powerful organization. Mu Xing suggests Shi Qiang to investigate together.The Global Battle Command Center realizes the power of the enemy as there are European scientists killed. Ye Wenjie tells Wang Miao the rest of her story.
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Episode Fourteen

S1 E14 / 45m 32s / TV-14
Ye Wenjie’s talents are noticed by Lei Zhicheng, chief officer of the Red Coast project. Commissar Lei lied to her about the true mission of the Red Coast project. Yang Weining tried to stop it but Ye Wenjie was transferred to the Monitoring Department. Wang Miao wants to know more about the project; Ye Wenjie does not say, but provides more material to help Wang Miao understand the flying stars.
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Episode Fifteen

S1 E15 / 45m 56s / TV-14
Wang Miao re-enters the game with his daughter’s inspiration and Ye Wenjie’s interpretation. He understands the concept of the Stable Era and the Chaotic Era based on the movements of the three suns, helping him to enter the next stage of the game. Shi Qiang and Xu Bingbing become more suspicious about Ye Wenjie because of her financial aid to her niece, Chen Xue. Wang Miao re-enters the game.
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Episode Sixteen

S1 E16 / 45m 9s / TV-14
A Tri-Solar Syzygy (a straight line configuration of three or more celestial bodies in a gravitational system) ends Civilization No.184. Pan Han reveals more facts in order to use Mu Xing as a weapon. She plays along and steals material from Pan’s computer as evidence. Wang Miao is invited to a players’ meet-up by the system administrator of the game. Pan Han threatens Shen Yufei and her husband.
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Episode Seventeen

S1 E17 / 43m 15s / TV-14
Shi Qiang and Wang Miao embark on a mission to find Shen Yufei and Ye Wenjie. Shen Yufei is saved from an assassination attempt by Chen Xue on the train. The Earth Three-body Organization is divided, hindering communication with the "Lord." Ye Wenjie establishes the Third Red Coast Base but receives no messages. Concerned for Shen Yufei's safety, Ye Wenjie urges her to leave.
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Episode Eighteen

S1 E18 / 42m 10s
Ye Wenjie was moved by Lei Zhicheng's respect and trust. With Yang Weining's help, she discovered that Red Coast was searching for aliens. They sent a message but got no response. Wang Miao and Ye Wenjie are touched by the project's vision, but it closes due to no discoveries. Ye Wenjie says goodbye to Wang Miao and waits for an old friend while watching the sunset.
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Episode Nineteen

S1 E19 / 46m 19s / TV-14
Wang Miao and Shi Qiang share their information but Shi Qiang doubts it's all a coincidence. Ye Wenjie waits for ETO leader Evans at the Red Coast Base. They have a candid talk revealing their philosophical differences.Ye Wenjie believes Evans manipulates the Lord's will for personal gain. Hearing Evans' plan to destroy humanity, Ye Wenjie really regrets it.
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Episode Twenty

S1 E20 / 45m 56s
Wei Cheng's addiction to Three-Body computing led him to marry Shen Yufei. Pan Han threatened Wei Cheng, but Shen Yufei compelled him to continue. Feeling threatened, Wei Cheng sought help from the police. In detention, he completes the Three-Body model and gives it to Wang Miao. Wang Miao enters the game and realizes the problem's unsolvability, causing Shen Yufei's despair.
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