
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.

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.

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.