Signal (Korean: 시그널; RR: Sigeuneol ) is a 2016 South Korean fantasy
police procedural television series 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, including the Hwaseong serial murders, the
series aired on tvN from January 22 to March 12, 2016 on Fridays and Saturdays
at 20:30 KST for 16 episodes.
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%.
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