Signal (South Korean TV series)

*Signal*
Signal
	Promotional poster
Hangul	시그널
Revised Romanization	Sigeuneol
Genre	Procedural; Drama; Thriller; Fantasy;
Created by	Choi Jin-hee; Park Ji-young;
Based on	Frequency; by Toby Emmerich
Written by	Kim Eun-hee
Directed by	Kim Won-seok
Starring	Lee Je-hoon; Kim Hye-soo; Cho Jin-woong;
Opening theme	"I Will Forget You"; by Jung Cha-sik
Ending theme	Various songs
Composers	Kim Joon-seok; Park Sung-il;
Country of origin	South Korea
Original language	Korean
No. of seasons	1
No. of episodes	16 (list of episodes)
Production
Executive producers	Lee Chan-ho; Lee Sang-baek;
Producers	Lee Jae-moon; Park Eun-kyung;
Cinematography	Choi Sang-mook; Lee Joo-young;
Editor	Kim Na-young
Camera setup	Single camera
Running time	64–88 minutes
Production companies	AStory (season 1); B.A. Entertainment (season 2); Baram Pictures (season 2); Studio Dragon (season 2);
Original release
Network	tvN; AXN
Release	January 22, 2016 –; present
Related
	Signal (2018); Gyaarah Gyaarah (2024);
	Infobox instructions (only shown in preview)

Signal (Korean: 시그널) is a South Korean television series written by Kim Eun-hee, directed by Kim Won-seok, and starring Lee Je-hoon, Kim Hye-soo, and Cho Jin-woong. Based on the 2000 film Frequency in premise and inspired by real-life criminal incidents in Korea,^[1] including the Hwaseong serial murders.^[2]^[3] The first season aired on tvN from January 22 to March 12, 2016, every Friday and Saturday at 20:30 (KST).^[4]^[5]^[6] In March 2024, a second season was confirmed in production.^[7]

The series received widespread acclaim from audiences and critics alike for its story and performances. It is also one of the highest-rated Korean dramas in cable television history with a peak audience viewership of 12.544%.