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The squad tries to identify the latest murder victim; Cha Soo Hyun grapples with a troubling past.

The squad tries to identify the latest murder victim; Cha Soo Hyun grapples with a troubling past.

Park Hae Young probes into Lee Jae Han's vanishing; Cha Soo Hyun encounters a ghost from the past.

Kyeong-jin, a victim of serial rape, faces another crisis in her family. The case turns public.

The Patrol hunts culprits, and another horror strikes as Jang-mi fears for safety.

As Han-sol predicted, Yang-chon erupts when he learns what Ju-yeong has been doing.

Yoo-jin proceeds with a new scheme to consolidate her power; a witness to Hye-rin's death appears.

Yoo-jin and JSS hunt for Gwan-su; they are given a secret mission to kill Je-ha.

Amid the chaos, Je-ha and Anna realize that they are in love; the two strike back at Yoo-jin.

One homeless guy causes chaos at the Center. Upon giving birth, Hyun-jin feels everything changed.

After checking the fingerprint of Da-hye, the squad tracks down the whereabouts of her.

After Su-hyeon dies, Hae-young contemplates whether he should keep the walkie-talkie.

Kyeong-jin, a victim of serial rape, faces another crisis in her family. The case turns public.

The Patrol hunts culprits, and another horror strikes as Jang-mi fears for safety.

As Han-sol predicted, Yang-chon erupts when he learns what Ju-yeong has been doing.

Yoo-jin proceeds with a new scheme to consolidate her power; a witness to Hye-rin's death appears.

Yoo-jin and JSS hunt for Gwan-su; they are given a secret mission to kill Je-ha.

Amid the chaos, Je-ha and Anna realize that they are in love; the two strike back at Yoo-jin.

One homeless guy causes chaos at the Center. Upon giving birth, Hyun-jin feels everything changed.

After checking the fingerprint of Da-hye, the squad tracks down the whereabouts of her.

After Su-hyeon dies, Hae-young contemplates whether he should keep the walkie-talkie.