Signal
Park Hae Young uncovers clues to his brother's death; Cha Soo Hyun discovers the radio.
Park Hae Young uncovers clues to his brother's death; Cha Soo Hyun discovers the radio.
The squad reopens the Injoo gang rape case; Lee Jae Han learns something about Park Hae Young.
Lee Jung-jae is here! A joyful winter days with him at Daegwallyeong!
First dinner at the mountain village: a feast of winter flavors!
Extreme winter in Gangwon-do: Siblings tackle fishing and cooking challenges again!
Jae Han, armed with the knowledge that he will die, confronts Kim Bum Joo to end things for good.
Park Hae Young gets arrested for murder; Cha Soo Hyun becomes determined to save Lee Jae Han.
Eunjeong changes her outlook after meeting Gyeonghoon. Hyunjin tries to extend her maternity leave.
Park Hae Young uncovers clues to his brother's death; Cha Soo Hyun discovers the radio.
The squad reopens the Injoo gang rape case; Lee Jae Han learns something about Park Hae Young.
Sang-soo shoots the criminal. He is revealed as not being the real culprit. Sang-soo is cornered.
Jeong-oh is determined to leave. Sang-soo pulls out a gun to save Yang-chon and the victim.
Yang-chon and Sang-soo see their peer get shot and faint. Unjust reality makes Jeong-oh afraid.
Yoo-jin offers an irresistible deal; Anna discovers the real culprit of her mother's death.
Anna is on a plane to Spain; Je-ha faces another threat; Seong-won invades Cloud Nine with a bomb.
Je-ha's in a coma; Gwan-su camps out at JSS, and Seong-won looks for a memory card that Je-ha took.
People are surprised to see Ru-da changed. Eun-jung faces something embarrassing at the event.
When the section chief dies, Park Hae Young gets blamed for his murder.
The cold case squad closes the Hongwon-dong serial killer case; Lee Jae Han's actions change time.
Sang-soo shoots the criminal. He is revealed as not being the real culprit. Sang-soo is cornered.