Season 1

01 Episode 1 Episode 117th February 2021 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. 02 Episode 2 Episode 218th February 2021 The contents of a mysterious suitcase give Tae-sul more questions than answers. In exchange for lottery numbers, Sun agrees to help Seo-hae. 03 Episode 3 Episode 324th February 2021 Tae-sul's presentation at a conference gets a violent interruption. He and Seo-hae make a narrow escape, but more trouble soon follows. 04 Episode 4 Episode 425th February 2021 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. 05 Episode 5 Episode 53rd March 2021 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. 06 Episode 6 Episode 64th March 2021 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. 07 Episode 7 Episode 710th March 2021 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. 08 Episode 8 Episode 811th March 2021 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. 09 Episode 9 Episode 917th March 2021 At the amusement park with Tae-sul for her birthday, Seo-hae encounters someone unexpected. A familiar threat strikes again. 10 Episode 10 Episode 1018th March 2021 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 Episode 1124th March 2021 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 Episode 1225th March 2021 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 Episode 1331st March 2021 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 Episode 141st April 2021 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 Episode 157th April 2021 As Tae-sul tries to locate him, Sigma reveals more details about himself. Sun frees Seo-hae from the bunker. 16 Episode 16 Episode 168th April 2021 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.