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Now playing: Season 1, Episode 12 — Episode 12
An unfathomable incident introduces a genius engineer to dangerous secrets of the world — and to a woman from the future who's come looking for him.
1. Episode 1
2021-02-17
Aboard a falling plane as the clock ticks toward doom, Han Tae-sul puts his famous mind to work for a solution. Gang Seo-hae arrives in the year 2020.
2. Episode 2
2021-02-18
The contents of a mysterious suitcase give Tae-sul more questions than answers. In exchange for lottery numbers, Sun agrees to help Seo-hae.
3. Episode 3
2021-02-24
Tae-sul's presentation at a conference gets a violent interruption. He and Seo-hae make a narrow escape, but more trouble soon follows.
4. Episode 4
2021-02-25
On the run from the enforcement agency, Tae-sul and Seo-hae give in to the time traveler's request that they make a stop at his mother's house.
5. Episode 5
2021-03-03
Caught by Kim Seo-jin trespassing in her clinic, Tae-sul tries to explain what's going on. Seo-hae reveals disturbing details about the future.
6. Episode 6
2021-03-04
Seo-hae infiltrates Eddy Kim's party with a mission. After a series of distressing events, Tae-sul realizes he cannot trust everyone around him.
7. Episode 7
2021-03-10
Seo-hae urges Sun to flee the country, and asks Mr. Park to do her a favor in exchange for an item he's eager to get his hands on.
8. Episode 8
2021-03-11
Despite Seo-hae's insistence that he lie low, Tae-sul focuses on tracking down an enigmatic figure who seems to be tied to everything.
9. Episode 9
2021-03-17
At the amusement park with Tae-sul for her birthday, Seo-hae encounters someone unexpected. A familiar threat strikes again.
10. Episode 10
2021-03-18
Tae-sul enters enemy quarters to retrieve Seo-hae. Learning she's been put in a dire condition, he turns to a grudging Mr. Park for assistance.
11. Episode 11
2021-03-24
Tae-sul and Sigma come face-to-face. In order to rescue Seo-hae, Tae-sul must endure an emotional trip through his past.
12. Episode 12
2021-03-25
When Seo-hae wakes up, a person she missed is waiting to meet her. A long-forgotten childhood memory returns to Tae-sul.
13. Episode 13
2021-03-31
Tae-sul is reunited with a trusty friend, who comes to him with a warning. A suitcase containing disturbing contents arrives at Asia Mart.
14. Episode 14
2021-04-01
With the war looming on the horizon, everyone must make their choices. When Seo-hae heads to the only place she knows, Tae-sul finds her.
15. Episode 15
2021-04-07
As Tae-sul tries to locate him, Sigma reveals more details about himself. Sun frees Seo-hae from the bunker.
16. Episode 16
2021-04-08
Tae-sul asks Seo-hae to trust him no matter what happens — and demonstrates that nothing is fixed when it comes to matters of the future.
Cho Seung-woo
Han Tae-sul
Park Shin-hye
Gang Seo-hae
Chae Jong-hyeop
Choi Jae-sun
Sung Dong-il
Park Hyeong-do
Tae In-ho
Eddie Kim
Tae Won-seok
Yeo Bong-sun
Jeon Kuk-hwan
Kim Han-yong
Heo Joon-seok
Han Tae-san
Jung Hye-in
Kim Seo-jin
Choi Jung-woo
Hwang Hyun-seung
Go Yoon
Jung Hyeon-gi
Kim Byong-chul
Seo Won-ju
