The essential episodes of Signal
Watch these 15 in order and you've got Signal — each pick states its reason.
- 01
Profiler Park Hae-young hears a man calling his name through a discarded two-way radio. The voice starts talking about an unsolved crime.
- 02
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.
- 03
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.
- 04
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.
- 05
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.
- 06
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.
- 07
Soo-hyun and Hae-young notice a connection between the burglary case and Da-hye, the woman who killed herself twenty years ago.
- 08
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.
- 09
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.
- 10
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.
- 11
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.
- 12
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.
- 13
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.
- 14
Hae-young is in critical condition after being shot while meeting with Sung-bum. In 2000, Jae-han has been captured by Bum-joo.
- 15
Shows like Signal
The closest matches on shared genres, ranked by match strength and popularity.
- 01Crime·Mystery·ComedyThe essential episodes of Only Murders in the Building2021–present·Hulu
Only Murders in the Building follows three New Yorkers who find they have a mutual interest in solving true crime – but limit their amateur sleuthing to only murders in their building. - 02Crime·Mystery·Science-FictionThe essential episodes of Sugar2024
John Sugar is an American private investigator on the heels of the mysterious disappearance of Olivia Siegel, the beloved granddaughter of legendary Hollywood producer Jonathan Siegel. - 03Drama·Crime·MysteryThe essential episodes of High Potential2024–present·ABC
High Potential follows Morgan, a single mom with an exceptional mind, whose unconventional knack for solving crimes leads to an unusual and unstoppable partnership with a by-the-book seasoned detective. - 04Drama·Crime·MysteryThe essential episodes of Castle2009–2016·ABC
Castle follows Rick Castle who is one of the world's most successful crime authors. - 05Drama·Crime·MysteryThe essential episodes of The Mentalist2008–2015·CBSPatrick Jane, an independent consultant with the California Bureau of Investigation (CBI), has a remarkable track record for solving serious crimes by using his razor sharp skills of observation.
- 06Drama·Crime·MysteryThe essential episodes of Elementary2012–2019·CBSElementary is a modern-day take on the classic Sherlock Holmes story about a crime-solving duo that cracks the NYPD's most impossible cases.
