S01:É01 - S01:E01 - Episode 1
When mysterious murders involving only women occur, Detective Kwang-ho takes the case.
S01:É02 - S01:E02 - Episode 2
Kwang-ho finds himself 30 years in the future, and Korea's first female serial killer is found dead.
S01:É03 - S01:E03 - Episode 3
A 5th victim is found 30 years later as Kwang-ho looks for a link between the past and present.
S01:É04 - S01:E04 - Episode 4
A fire erupts in the apartment below Kwang-ho, and Chief Sung-shik becomes suspiciuos.
S01:É05 - S01:E05 - Episode 5
A victim marked with the 7th dot appears as Seon-jae is desperate to catch the killer.
S01:É06 - S01:E06 - Episode 6
1958-born Kwang-ho chases 1988-born Kwang-ho to find his way back to his own time.
S01:É07 - S01:E07 - Episode 7
Seon-jae finds 1988-born Kwang-ho and begins an investigation to prove the other Kwang-ho is a fake.
S01:É08 - S01:E08 - Episode 8
Kwang-ho learns how fate has tied him and Seon-jae together, but Seon-jae is dubious.
S01:É09 - S01:E09 - Episode 9
Kwang-ho is shocked by his wife's death as Seon-jae suggests he catch the culprit with him.
S01:É10 - S01:E10 - Episode 10
The true culprit of the serial murders 30 years ago is revealed, and another victim appears.
S01:É11 - S01:E11 - Episode 11
Kwang-ho finally recognizes his daughter as he and Seon-jae work to arrest the suspect.
S01:É12 - S01:E12 - Episode 12
Ho-young commits suicide, and Kwang-ho finds new clues to the case from 30 years ago.
S01:É13 - S01:E13 - Episode 13
The real criminal behind the case from 30 years ago is revealed, and Kwang-ho returns to the past.
S01:É14 - S01:E14 - Episode 14
Kwang-ho finds the younger Jin-woo and chases him but is sent back to the present.
S01:É15 - S01:E15 - Episode 15
Jae-i tells Kwang-ho the location of the fountain pen, but Jin-woo is eavesdropping.
S01:É16 - S01:E16 - Episode 16
When Jin-woo decides to take revenge on Kwang-ho, Jae-i finds herself in danger once again.