Show cover for Signal

The Best Episodes of Signal

Every episode of Signal ranked from best to worst. Let's dive into the Best Episodes of Signal!


Detectives from the present and a detective from the past communicate via walkie-talkie to solve a long-time unsolved case.

Genres:CrimeMysterySci-Fi & Fantasy
Network:tvN

Top Episode Highlight

The best episode of "Signal" is "How Are You Alive?", rated 8.4/10 from 163 user votes. It was directed by Kim Won-suk and written by Kim Eun-hee. "How Are You Alive?" aired on 2/13/2016 and is rated 0.2 point(s) higher than the second highest rated, "We Found the Killer".

  • How Are You Alive?
    8.4/10 163 votes

    #1 - How Are You Alive?

    Season 1 Episode 8 - Aired 2016-02-13

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

    Director: Kim Won-suk

    Writer: Kim Eun-hee

  • We Found the Killer
    8.2/10 192 votes

    #2 - We Found the Killer

    Season 1 Episode 4 - Aired 2016-01-30

    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.

    Director: Kim Won-suk

    Writer: Kim Eun-hee

  • The Case Was Manipulated
    8.1/10 147 votes

    #3 - The Case Was Manipulated

    Season 1 Episode 12 - Aired 2016-02-27

    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.

    Director: Kim Won-suk

    Writer: Kim Eun-hee

  • We Still Have a Chance
    8.0/10 203 votes

    #4 - We Still Have a Chance

    Season 1 Episode 2 - Aired 2016-01-23

    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.

    Director: Kim Won-suk

    Writer: Kim Eun-hee

  • We Can Prevent the Killings
    8.0/10 187 votes

    #5 - We Can Prevent the Killings

    Season 1 Episode 3 - Aired 2016-01-29

    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.

    Director: Kim Won-suk

    Writer: Kim Eun-hee

  • Someone Has to Stop the Bad Guys
    8.0/10 150 votes

    #6 - Someone Has to Stop the Bad Guys

    Season 1 Episode 10 - Aired 2016-02-20

    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.

    Director: Kim Won-suk

    Writer: Kim Eun-hee

  • The Real Assailant
    8.0/10 150 votes

    #7 - The Real Assailant

    Season 1 Episode 13 - Aired 2016-03-04

    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.

    Director: Kim Won-suk

    Writer: Kim Eun-hee

  • Is It Really You?
    8.0/10 146 votes

    #8 - Is It Really You?

    Season 1 Episode 15 - Aired 2016-03-11

    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.

    Director: Kim Won-suk

    Writer: Kim Eun-hee

  • You're Doomed
    7.9/10 247 votes

    #9 - You're Doomed

    Season 1 Episode 1 - Aired 2016-01-22

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

    Director: Kim Won-suk

    Writer: Kim Eun-hee

  • Hongwon Dong Case
    7.9/10 153 votes

    #10 - Hongwon Dong Case

    Season 1 Episode 9 - Aired 2016-02-19

    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.

    Director: Kim Won-suk

    Writer: Kim Eun-hee

  • Not Now, But Maybe In The Past
    7.9/10 143 votes

    #11 - Not Now, But Maybe In The Past

    Season 1 Episode 14 - Aired 2016-03-05

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

    Director: Kim Won-suk

    Writer: Kim Eun-hee

  • Catch Him by All Means
    7.8/10 161 votes

    #12 - Catch Him by All Means

    Season 1 Episode 6 - Aired 2016-02-06

    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.

    Director: Kim Won-suk

    Writer: Kim Eun-hee

  • The One Last Case
    7.6/10 147 votes

    #13 - The One Last Case

    Season 1 Episode 11 - Aired 2016-02-26

    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.

    Director: Kim Won-suk

    Writer: Kim Eun-hee

  • We Must Dig Deeper
    7.5/10 153 votes

    #14 - We Must Dig Deeper

    Season 1 Episode 7 - Aired 2016-02-12

    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.

    Director: Kim Won-suk

    Writer: Kim Eun-hee

  • If You Don't Give Up
    7.5/10 165 votes

    #15 - If You Don't Give Up

    Season 1 Episode 16 - Aired 2016-03-12

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

    Director: Kim Won-suk

    Writer: Kim Eun-hee

  • Changing the Past Alters the Present
    7.4/10 165 votes

    #16 - Changing the Past Alters the Present

    Season 1 Episode 5 - Aired 2016-02-05

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

    Director: Kim Won-suk

    Writer: Kim Eun-hee