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The Worst Episodes of Signal

Every episode of Signal ranked from worst to best. Explore the Worst Episodes of Signal!

Binge this in 19h 13m•Peaking at 8.4/10


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

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Episode Rankings

  1. #1 Worst Episode
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    Signal Season 1 Episode 5 - Changing the Past Alters the Present
    7.4/10(209 votes)

    #1 - Changing the Past Alters the Present

    S1:E5

    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:Unknown

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  2. Signal Season 1 Episode 16 - If You Don't Give Up
    7.5/10(204 votes)

    #2 - If You Don't Give Up

    S1:E16

    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:Unknown

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  3. Signal Season 1 Episode 7 - We Must Dig Deeper
    7.6/10(192 votes)

    #3 - We Must Dig Deeper

    S1:E7

    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:Unknown

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  4. Signal Season 1 Episode 11 - The One Last Case
    7.7/10(186 votes)

    #4 - The One Last Case

    S1:E11

    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:Unknown

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  5. Signal Season 1 Episode 6 - Catch Him by All Means
    7.8/10(202 votes)

    #5 - Catch Him by All Means

    S1:E6

    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:Unknown

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  6. Signal Season 1 Episode 1 - You're Doomed
    7.9/10(305 votes)

    #6 - You're Doomed

    S1:E1

    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:Unknown

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  7. Signal Season 1 Episode 2 - We Still Have a Chance
    7.9/10(256 votes)

    #7 - We Still Have a Chance

    S1:E2

    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:Unknown

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  8. Signal Season 1 Episode 3 - We Can Prevent the Killings
    7.9/10(235 votes)

    #8 - We Can Prevent the Killings

    S1:E3

    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:Unknown

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  9. Signal Season 1 Episode 9 - Hongwon-dong Case
    7.9/10(193 votes)

    #9 - Hongwon-dong Case

    S1:E9

    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:Unknown

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  10. Signal Season 1 Episode 14 - Not Now, but Maybe in the Past
    7.9/10(181 votes)

    #10 - Not Now, but Maybe in the Past

    S1:E14

    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:Unknown

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  11. Signal Season 1 Episode 15 - Is It Really You?
    8.0/10(184 votes)

    #11 - Is It Really You?

    S1:E15

    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:Unknown

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  12. Signal Season 1 Episode 10 - Someone Has to Stop the Bad Guys
    8.1/10(191 votes)

    #12 - Someone Has to Stop the Bad Guys

    S1:E10

    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:Unknown

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  13. Signal Season 1 Episode 12 - The Case Was Manipulated
    8.1/10(185 votes)

    #13 - The Case Was Manipulated

    S1:E12

    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:Unknown

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  14. Signal Season 1 Episode 13 - The Real Assailant
    8.1/10(189 votes)

    #14 - The Real Assailant

    S1:E13

    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:Unknown

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  15. Signal Season 1 Episode 4 - We Found the Killer
    8.2/10(246 votes)

    #15 - We Found the Killer

    S1:E4

    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:Unknown

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  16. Signal Season 1 Episode 8 - How Are You Alive?
    8.4/10(209 votes)

    #16 - How Are You Alive?

    S1:E8

    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:Unknown

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Worst Episodes Summary

"Changing the Past Alters the Present" is the worst rated episode of "Signal". It scored 7.4/10 based on 209 votes. Directed by Kim Won-suk and written by Unknown, it aired on 2/5/2016. This episode scored 0.1 points lower than the second lowest rated, "If You Don't Give Up".