Signal

• 
  E1

  You're Doomed

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

  2016-01-22 · 67m
• 
  E2

  We Still Have a Chance

  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.

  2016-01-23 · 66m
• 
  E3

  We Can Prevent the Killings

  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.

  2016-01-29 · 65m
• 
  E4

  We Found the Killer

  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.

  2016-01-30 · 65m
• 
  E5

  Changing the Past Alters the Present

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

  2016-02-05 · 68m
• 
  E6

  Catch Him by All Means

  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.

  2016-02-06 · 70m
• 
  E7

  We Must Dig Deeper

  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.

  2016-02-12 · 67m
• 
  E8

  How Are You Alive?

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

  2016-02-13 · 74m
• 
  E9

  Hongwon-dong Case

  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.

  2016-02-19 · 74m
• 
  E10

  Someone Has to Stop the Bad Guys

  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.

  2016-02-20 · 72m
• 
  E11

  The One Last Case

  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.

  2016-02-26 · 78m
• 
  E12

  The Case Was Manipulated

  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.

  2016-02-27 · 78m
• 
  E13

  The Real Assailant

  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.

  2016-03-04 · 74m
• 
  E14

  Not Now, but Maybe in the Past

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

  2016-03-05 · 74m
• 
  E15

  Is It Really You?

  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.

  2016-03-11 · 72m
• 
  E16

  If You Don't Give Up

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

  2016-03-12 · 89m

Top cast

Lee Je-hoon

Park Hae-young

Kim Hye-soo

Cha Soo-hyun

Cho Jin-woong

Lee Jae-han

Jang Hyun-sung

Kim Bum-joo

Jung Hae-kyun

Ahn Chi-soo

Kim Won-hae

Kim Gye-chul

Jung Han-bi

Oh Yoon-seo

Lee Yoo-jun

Jung Heon-gi

Kim Min-gue

Hwang Ui-kyung

Kang Chan-hee

Park Sun-woo

Im Hwa-young

Cha Soo-min