Watch Signal

2016
1 Season
8.5 (9,840)

Signal is a South Korean drama that originally aired on tvN in 2016. The show stars Lee Jehoon, Kim Hye-su, and Cho Jin-woong, and is known for its unique approach to storytelling and its gripping plot. The show follows two detectives, Lee Jae-han (played by Lee Jehoon) and Cha Soo-hyun (played by Kim Hye-su), who are able to communicate with each other across time through a mysterious walkie-talkie. Together, they work to solve cold cases from the past, which ultimately leads them to a serial killer.

What sets Signal apart from other crime dramas is its ability to seamlessly weave together elements of the past and present. The show is expertly crafted, with each episode leaving viewers on the edge of their seats as the detectives get closer and closer to uncovering the truth.

One of the key strengths of Signal is its cast. Lee Jehoon delivers a standout performance as Lee Jae-han, the brilliant detective who is able to see patterns and connections that others can't. Kim Hye-su also shines as Cha Soo-hyun, a detective who is haunted by her past and driven to solve long-unsolved cases. Together, they have a great on-screen chemistry that makes their partnership feel believable and engaging.

The show also features a standout performance from Cho Jin-woong, who portrays a detective from the past named Park Hae-young. Park is a tragic figure who is determined to save his brother from a terrible fate, and Cho's portrayal of the character is both heartbreaking and nuanced.

Overall, Signal is a masterful drama that deftly balances suspense, drama, and heartfelt emotion. It's a must-watch for fans of crime dramas, and anyone who appreciates a good story told with skill and sensitivity. With its strong ensemble cast, expert writing, and unforgettable plot, Signal is a true gem of Korean television.

Signal is a series that ran for 1 seasons (16 episodes) between January 22, 2016 and on tvN

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Seasons

16. Episode 16

March 12, 2016

Lee Jae Han is set on bringing down Kim Bum Joo, despite knowing that he's going to die, but a certain transmission is about to make all the difference.

15. Episode 15

March 11, 2016

Park Hae Young is framed and arrested for the murder of the Section Chief. Cha Soo Hyun sets out to save Lee Jae Han and to find the one witness who can bring down their enemy.

14. Episode 14

March 5, 2016

Following the trail the Section Chief left, Park Hae Young uncovers the truth behind his brother's death. Meanwhile, Cha Soo Hyun finds Lee Jae Han's radio in Hae Young's possession.

13. Episode 13

March 4, 2016

The Cold Case Squad secretly reinvestigates the Injoo gang rape case. Lee Jae Han finds out the connection Park Hae Young has to the case.

12. Episode 12

February 27, 2016

Park Hae Young becomes the prime suspect for the Section Chief's murder. Meanwhile, Lee Jae Han must find out who this "one" is before it's too late.

11. Episode 11

February 26, 2016

The Cold Case Squad catches the Hongwon-dong serial killer, but Lee Jae Han's determination changes the past again.

10. Episode 10

February 20, 2016

The Cold Case Squad is assigned to the serial murder, but the last the victims isn't identified. Cha Soo Hyun revisits a past trauma.

9. Episode 9

February 19, 2016

Park Hae Young uncovers another layer to Lee Jae Han's disappearance. An old demon from Cha Soo Hyun's past resurfaces.

8. Episode 8

February 13, 2016

The cold case squad finds Shin Da Hye, who has been living under the murder victim's identity.

7. Episode 7

February 12, 2016

Lee Jae Han catches the real culprit behind the burglaries, unwittingly changing the past for the worse again.

6. Episode 6

February 6, 2016

Park Hae Young figures out that Oh Kyung Tae's true objective is the father of the girl he kidnaps.

5. Episode 5

February 5, 2016

Park Hae Young begins asking questions about Lee Jae Han. Meanwhile, the police force in Lee Jan Han's time struggles with a string of larceny cases.

4. Episode 4

January 30, 2016

The cold case squad figures out who the serial killer is, but not before the wrong suspect turns himself in.

3. Episode 3

January 29, 2016

During the investigation of the serial murders, Park Hae Young discovers that the radio transmissions are actually connecting him to the past.

2. Episode 2

January 23, 2016

After the Kim Yoon Jung kidnapping case, the Chief of police creates a cold case squad. Their first case is the infamous Gyeonggi Nambu serial murders.

1. Episode 1

January 22, 2016

Haunted by a classmate's kidnapping 15 years ago, Park Hae Young becomes a police profiler who's lost faith in the police force. This all changes when he stumbles upon an old radio that's receiving transmissions from the past.

Description

Where to Watch Signal

Signal is available for streaming on the tvN website, both individual episodes and full seasons. You can also watch Signal on demand at Paramount+, Amazon Prime, Netflix and Tubi TV.