Signal

Communicating via a walkie-talkie that transcends time, a profiler from 2015 and a detective from 1989 join forces to tackle crimes and injustice.

1. 
   E1 · You're Doomed1h 7mJan 22, 2016

   Profiler Park Hae-young hears a man calling his name through a discarded two-way radio. The voice starts talking about an unsolved crime.

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2. 
   E2 · We Still Have a Chance1h 6mJan 23, 2016

   The statute of limitations is lifted after the suspect's arrest. Hae-young joins Soo-hyun's team for the newly established cold case squad.

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3. 
   E3 · We Can Prevent the Killings1h 5mJan 29, 2016

   Reality 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.

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4. 
   E4 · We Found the Killer1h 5mJan 30, 2016

   The 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.

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5. 
   E5 · Changing the Past Alters the Present1h 8mFeb 5, 2016

   Hae-young starts to investigate Jae-han's disappearance. Jae-han's former colleagues get suspicious about seeing Hae-young digging into the past.

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6. 
   E6 · Catch Him by All Means1h 10mFeb 6, 2016

   Seeking vengeance for the events that lead to the death of his daughter, Kyung-tae commits a kidnapping after getting out of prison for burglary.

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7. 
   E7 · We Must Dig Deeper1h 7mFeb 12, 2016

   Jae-han arrests Se-kyu for the serial burglary case, but the culprit is freed after serving a short sentence; Kyung-tae still commits murder.

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8. 
   E8 · How Are You Alive?1h 14mFeb 13, 2016

   Soo-hyun and Hae-young notice a connection between the burglary case and Da-hye, the woman who killed herself twenty years ago.

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9. 
   E9 · Hongwon-dong Case1h 14mFeb 19, 2016

   Hae-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.

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10. 
    E10 · Someone Has to Stop the Bad Guys1h 12mFeb 20, 2016

    The 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.

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11. 
    E11 · The One Last Case1h 18mFeb 26, 2016

    Hae-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.

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12. 
    E12 · The Case Was Manipulated1h 18mFeb 27, 2016

    Hae-young becomes a suspect for the murder of Chi-soo. Jae-han realizes who the principle offender of the attack on Hye-seung is.

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13. 
    E13 · The Real Assailant1h 14mMar 4, 2016

    Soo-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.

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14. 
    E14 · Not Now, but Maybe in the Past1h 14mMar 5, 2016

    Hae-young realizes the possibility that his brother could have been murdered after learning from Hye-seung that Sun-woo was not guilty.

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15. 
    E15 · Is It Really You?1h 12mMar 11, 2016

    Hae-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.

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16. 
    E16 · If You Don't Give Up1h 29mMar 12, 2016

    Hae-young is in critical condition after being shot while meeting with Sung-bum. In 2000, Jae-han has been captured by Bum-joo.

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