7.9/10261 votes#1 - You're Doomed
Season 1 Episode 1 - Aired 1/22/2016
Profiler Park Hae-young hears a man calling his name through a discarded two-way radio. The voice starts talking about an unsolved crime.
Director: Kim Won-suk
Writer: N/A
8.0/10217 votes#2 - We Still Have a Chance
Season 1 Episode 2 - Aired 1/23/2016
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.
Director: Kim Won-suk
Writer: N/A
8.0/10201 votes#3 - We Can Prevent the Killings
Season 1 Episode 3 - Aired 1/29/2016
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.
Director: Kim Won-suk
Writer: N/A
8.2/10208 votes#4 - We Found the Killer
Season 1 Episode 4 - Aired 1/30/2016
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.
Director: Kim Won-suk
Writer: N/A
7.4/10177 votes#5 - Changing the Past Alters the Present
Season 1 Episode 5 - Aired 2/5/2016
Hae-young starts to investigate Jae-han's disappearance. Jae-han's former colleagues get suspicious about seeing Hae-young digging into the past.
Director: Kim Won-suk
Writer: N/A
7.8/10173 votes#6 - Catch Him by All Means
Season 1 Episode 6 - Aired 2/6/2016
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.
Director: Kim Won-suk
Writer: N/A
7.6/10164 votes#7 - We Must Dig Deeper
Season 1 Episode 7 - Aired 2/12/2016
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.
Director: Kim Won-suk
Writer: N/A
8.4/10175 votes#8 - How Are You Alive?
Season 1 Episode 8 - Aired 2/13/2016
Soo-hyun and Hae-young notice a connection between the burglary case and Da-hye, the woman who killed herself twenty years ago.
Director: Kim Won-suk
Writer: N/A
7.9/10164 votes#9 - Hongwon Dong Case
Season 1 Episode 9 - Aired 2/19/2016
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.
Director: Kim Won-suk
Writer: N/A
8.1/10160 votes#10 - Someone Has to Stop the Bad Guys
Season 1 Episode 10 - Aired 2/20/2016
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.
Director: Kim Won-suk
Writer: N/A
7.6/10157 votes#11 - The One Last Case
Season 1 Episode 11 - Aired 2/26/2016
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.
Director: Kim Won-suk
Writer: N/A
8.1/10156 votes#12 - The Case Was Manipulated
Season 1 Episode 12 - Aired 2/27/2016
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.
Director: Kim Won-suk
Writer: N/A
8.1/10160 votes#13 - The Real Assailant
Season 1 Episode 13 - Aired 3/4/2016
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.
Director: Kim Won-suk
Writer: N/A
7.9/10151 votes#14 - Not Now, But Maybe In The Past
Season 1 Episode 14 - Aired 3/5/2016
Hae-young realizes the possibility that his brother could have been murdered after learning from Hye-seung that Sun-woo was not guilty.
Director: Kim Won-suk
Writer: N/A
8.1/10153 votes#15 - Is It Really You?
Season 1 Episode 15 - Aired 3/11/2016
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.
Director: Kim Won-suk
Writer: N/A
7.5/10173 votes#16 - If You Don't Give Up
Season 1 Episode 16 - Aired 3/12/2016
Hae-young is in critical condition after being shot while meeting with Sung-bum. In 2000, Jae-han has been captured by Bum-joo.
Director: Kim Won-suk
Writer: N/A
The Best Episodes of Signal Season 1
Every episode of Signal Season 1 ranked from best to worst. Discover the Best Episodes of Signal Season 1!
Detectives from the present and a detective from the past communicate via walkie-talkie to solve a long-time unsolved case.
Genres:CrimeMysterySci-Fi & FantasyDrama
Network:tvN
Season 1 Ratings Summary
"You're Doomed" is the best rated episode of "Signal" season 1. It scored 7.9/10 based on 261 votes. Directed by Kim Won-suk and written by N/A, it aired on 1/22/2016. This episode is rated 0.1 points higher than the second-best, "We Still Have a Chance".