Season 1
16 episodes · Jan 22, 2016
Communicating via a walkie-talkie that transcends time, a profiler from 2015 and a detective from 1989 join forces to tackle crimes and injustice.
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S1E1You're Doomed
Jan 22, 201667mProfiler Park Hae-young hears a man calling his name through a discarded two-way radio. The voice starts talking about an unsolved crime.
S1E2We Still Have a Chance
Jan 23, 201666mThe statute of limitations is lifted after the suspect's arrest. Hae-young joins Soo-hyun's team for the newly established cold case squad.
S1E3We Can Prevent the Killings
Jan 29, 201665mReality changes after Hae-young exchanges information with Jae-han. Hae-young tries to work together with Jae-han in 1989 to prevent the next murder.
S1E4We Found the Killer
Jan 30, 201665mThe ninth victim is Won-kyung, the woman Jae-han loves. A driver turns himself in, but Soo-hyun and Jae-han determine that his son is the real killer.
S1E5Changing the Past Alters the Present
Feb 5, 201668mHae-young starts to investigate Jae-han's disappearance. Jae-han's former colleagues get suspicious about seeing Hae-young digging into the past.
S1E6Catch Him by All Means
Feb 6, 201670mSeeking vengeance for the events that lead to the death of his daughter, Kyung-tae commits a kidnapping after getting out of prison for burglary.
S1E7We Must Dig Deeper
Feb 12, 201667mJae-han arrests Se-kyu for the serial burglary case, but the culprit is freed after serving a short sentence; Kyung-tae still commits murder.
S1E8How Are You Alive?
Feb 13, 201674mSoo-hyun and Hae-young notice a connection between the burglary case and Da-hye, the woman who killed herself twenty years ago.
S1E9Hongwon-dong Case
Feb 19, 201674mHae-young learns that Chi-soo and Jae-han met in 1999 during a case in Inju. After serving time for the crime, Hae-young's brother had killed himself.
S1E10Someone Has to Stop the Bad Guys
Feb 20, 201672mThe bodies discovered in the mountains appear to be more victims of the 1997 serial murder case. Jae-han learns that Soo-hyun became team leader.
S1E11The One Last Case
Feb 26, 201678mHae-young and Soo-hyun arrest Jin-woo after coming to the conclusion that he is the killer. Hae-young asks Jae-han about the Inju rape case.
S1E12The Case Was Manipulated
Feb 27, 201678mHae-young becomes a suspect for the murder of Chi-soo. Jae-han realizes who the principle offender of the attack on Hye-seung is.
S1E13The Real Assailant
Mar 4, 201674mSoo-hyun and the others mourn after confirming that the remains belong to Jae-han. Hae-young learns that Jae-han used to look after him in the past.
S1E14Not Now, but Maybe in the Past
Mar 5, 201674mHae-young realizes the possibility that his brother could have been murdered after learning from Hye-seung that Sun-woo was not guilty.
S1E15Is It Really You?
Mar 11, 201672mHae-young is arrested for the murder of Chi-soo. Soo-hyun hears Jae-han apologizing over the radio for not being able to prevent Sun-woo's death.
S1E16If You Don't Give Up
Mar 12, 201689mHae-young is in critical condition after being shot while meeting with Sung-bum. In 2000, Jae-han has been captured by Bum-joo.